RF: refactor test to work on numpy 1.5

Structured array comparisons with ``assert_array_compare`` fail for
numpy 1.5; use a more manual comparison method.
TST: travis builds with min / max dependencies

From an idea by Eric L.
MAINT: update .mailmap
MAINT: ignore buildbot patch

Patch written by `try_branch.py` when sending local changes for testing
by the buildbot.
MAINT: update package info

Update numpy dependency to 1.5, just because that seems to be the oldest
that anyone is supporting these days.

Update ourselves from alpha to beta status - yay!

Update links to downloads; these have changed since the last release.
DOC: update installation instructions

Prefer pip, forget easy_install
DOC: update author list on the front web page

Add authors joined since the last release.
DOC: formatting, years in COPYING file

Missing extra colon messing up formatting.
Update Michael's years of contribution.

FIx
DOC: small edits to docstring for generated docs

Buff up first line of a couple of modules.
DOC: update release-making instructions

Update instructions in preparation for new release.
BF: fix broken coverage runs in virtualenv

Now we're running in our own virtualenv, coverage was trying to cover
everything we imported.  I have no idea why that is, but futzing on a VM
similar to the travis machines seemed to recover the right behavior.
BF: set parrec data type to unsigned integers

Consensus seems to be that REC data is in uint format - see
https://github.com/nipy/nibabel/issues/275
NF: add guard for unexpected bit widths

From comment by Eric L
Merge pull request #279 from matthew-brett/parrec-as-uint

MRG: PAR / REC data are unsigned 8 or 16 bit integers

Consensus seems to be that REC data is in uint format - see 
#275

Raise error for data width other than 8 or 16 bit because we haven't any examples to know what these are.
TST: add MINC2 tests with data files

Use submodule to import data for MINC2 tests.
TST: set up installation of h5py

To run MINC2 tests.
NF: add support for V4 of PARREC format

V4 appears to differ only in having fewer general and image information
fields.
NF: add PARREC V4.1 support with tests

Add PARREC 4.1 support from information by Gregory Lee at
https://github.com/nipy/nibabel/pull/277
Merge pull request #277 from matthew-brett/parrec-v4-support

MRG: add support for V4, 4.1 of PARREC format

Versions 4 and 4.1 seem to differ only in in lacking a few 
fields of the 4.2 PAR header.
Merge pull request #280 from matthew-brett/add-minc2-tests

MRG: add MINC2 images repo, run tests on images

Install h5py for full tests using MINC2.