PlotItem.showValues fixed (was not implemented before).
Fixes calculation of axis width/height in case values are not shown.
Merge branch 'showValues_fix' of https://github.com/JNevrly/pyqtgraph into JNevrly-showValues_fix
Style changes and a minor bug fix
Fixed AxisItem.__init__(showValues=False)
Merge branch 'JNevrly-showValues_fix' into develop
py3 fix for parametertree example
Corrected how-to-use documentation on using git subtrees
Doc update
Added Travis CI support
Fixed bugs / style issues to please Lord Travis

Squashed commit of the following:

commit f25048a1e1e9d0be355f33fbaff6ef74845f4782
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Sun Mar 30 02:40:47 2014 -0400

    syntax

commit cc8b69695a2698b75ff216dce27fabe46c79a325
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Sun Mar 30 02:36:49 2014 -0400

    add size check, diff style check

commit 5d5ea065a4d4cc714bfaf7c7e7624295164cd86c
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Sun Mar 30 02:16:05 2014 -0400

    travis fix

commit b154c6d9971d35c2a46e575a0a884880ec14c8b1
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Sun Mar 30 02:09:41 2014 -0400

    travis, flake colored output

commit 46921dcd878fdc08f05ef74d08be7953b1820a85
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Wed Mar 26 12:37:54 2014 -0400

    fix pyside+py3 bugs to satisfy CI

commit 1d30f3c5c7763876ccfff54e460b83cb7422a5b4
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Wed Mar 26 11:13:18 2014 -0400

    fix py3 tests

commit 426578fa4c5ec991d361c60005c32ca88c85e505
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Wed Mar 26 07:39:19 2014 -0400

    fix pytest install

commit 88a13c1a7158904af7d25c5ba5bfc8e63e6cf49d
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Wed Mar 26 00:29:29 2014 -0400

    qt5 updates

commit 51995488ccc9f286aeced3bd49c3213819529e57
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Wed Mar 26 00:16:04 2014 -0400

    correct py.test command for py3

commit e2b02fbcbdbd95cbec5dd9307870f39337e6eb45
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Tue Mar 25 23:50:38 2014 -0400

    fix 2nd install test

commit 4b3e3ee04adee3a8d1aabdfb18a198cbd0e83a06
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Tue Mar 25 23:31:31 2014 -0400

    syntax error

commit 250eabdb34cac48d6f9622e6453235f0ec7f1151
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Tue Mar 25 23:13:42 2014 -0400

    look for py.test3

commit 9f9bca47c1a0a5c35be21835a674058242aa5f48
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Tue Mar 25 22:54:19 2014 -0400

    fix syntax

commit 0a871c6f36ecddb7a1002b74d3b6d433e1648e8f
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Tue Mar 25 22:47:58 2014 -0400

    output pip build log

commit dbce58d8cd3f3a558202f8d7a149b5ec8fbfcf78
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Tue Mar 25 22:38:55 2014 -0400

    no comments allowed between shall lines

commit b79c06121d8e40d8b2d2db0a4dd0a60fbf48edba
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Tue Mar 25 20:56:35 2014 -0400

    another pip try

commit 09f4f5d82ab41f66e5c746985f09dfcbe36f2089
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Tue Mar 25 13:36:09 2014 -0400

    pip correction

commit 0eedb5c18e7242370f996c6b7481fbcdc8e6caf2
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Tue Mar 25 13:29:00 2014 -0400

    correct py version output

commit d9fd039be22cb297f4de83f7ab543de25e2969dd
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Tue Mar 25 11:55:43 2014 -0400

    apt checks

commit cf95ccef86bd26964d73bdc649de8f23f64d2575
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Tue Mar 25 10:23:10 2014 -0400

    alternate pip install method

commit bee0bcddfef44917a5ee425557ba6ff246edec87
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 23:51:45 2014 -0400

    correct deps install

commit 963a4211fcaa5ebbfe0e13a5d879635bd77334ac
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 23:47:30 2014 -0400

    fixes

commit 0c86cd1dc28e286f999f01b37beb3c3252a8c864
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 23:31:06 2014 -0400

    permission fix

commit 5d04ef53b80a83aa62452ff9a9f9152ca862f8d8
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 23:30:19 2014 -0400

    Fix py.test version selection

commit b0e6c7cb94c7fa85653e492f8817e79b1ca30426
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 23:25:34 2014 -0400

    try another pyqt5 install method

commit 422a7928665b5afb72861400672cc81b4bcd9779
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 23:12:36 2014 -0400

    syntax error

commit 533133905a8e4f2ba26bc6e8f0e4fe631fbd119e
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 23:04:37 2014 -0400

    fixes

commit 8d65211ba4e08e4f4b13b68f9778c3aee4b43cdc
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 22:40:18 2014 -0400

    Add Qt5 test
    minor fixes

commit 4484efaefe0c99516940812d0472e82998e801f6
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 22:31:56 2014 -0400

    use correct py.test for python version

commit 5d2441a29b98ed573e15580fc5efd533352ffb45
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 22:24:27 2014 -0400

    add setup tests

commit 9291db64f25afeb46ee46d92b3bd13aabb325cfe
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 21:48:43 2014 -0400

    fix py3-pyqt install

commit a7aa675c5a5a5c4a2fff69feefc9298bcc626641
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 21:31:33 2014 -0400

    travis tests

commit e71cd2b23ab09490c29c1c8ee18fc4db87ff0c01
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 21:17:15 2014 -0400

    more corrections

commit 527df3bca897ba6a02cb3fe4a5a6db34042600b5
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 20:56:01 2014 -0400

    travis corrections

commit 87d65cac4aa3bf815860030fac78e8e28069e29d
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 20:48:02 2014 -0400

    Add flake tests
    Correct style in a few files to please Lord Travis

commit 537028f88f17da59a6e8a09b9a3dee34282791cf
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 17:36:24 2014 -0400

    minimize pyside package install
    correct line endings to satisfy Lord Travis

commit 1e3cc95e37f03f70f50900dcb2e8a4dc4772208a
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 17:23:03 2014 -0400

    enable pyside, line ending check
    fix test

commit d7df4517f9004399703cb44237d27be313405e84
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 17:12:06 2014 -0400

    syntax fix

commit 1ad77a21551c38f7ff77bd537eb6c2a9e13a26ae
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 17:00:30 2014 -0400

    alt. pytest install

commit 5edcc020729b1ecd452555852652720b4c3285f5
Author: Luke Campagnola <luke.campagnola@gmail.com>
Date:   Mon Mar 24 16:52:33 2014 -0400

    Added initial travis.yml