Added properly functioning case insensitive match without regex

pandas.core.strings.str_contains should now match case insensitivity properly if given regex=False and case=False.  Also added test cases for case insensitive pandas.core.strings.str_contains with and without regex.
Documentation for str_contains bug in changelog
BUG: grouped hist and scatter use old figsize default
BUG: single column bar plot is misaligned
BUG: Better xaxis handling for partial layout
Redesigned pandas.io.gbq to remove bq.py as a dependency for everything except unit testing. Minor API changes were also introduced.
Squashed commit of the following:

commit 5e9e0fa29d727953583a116638a9d0db81f9ed21
Author: Michael Mueller <michaeldmueller7@gmail.com>
Date:   Thu Jun 26 19:53:35 2014 -0400

    Fixed issue with empty lines

commit 57b54918b251ab77f000b575d77bcce3affcb27a
Author: Michael Mueller <michaeldmueller7@gmail.com>
Date:   Thu Jun 26 16:31:27 2014 -0400

    Added reference to new functionality in docs

commit a2371638691584416439d3c6a4dd2ef1829dcbe3
Author: Michael Mueller <michaeldmueller7@gmail.com>
Date:   Thu Jun 26 16:26:06 2014 -0400

    Implemented functionality to ignore comment lines, wrote a test
ENH: look for index columns in row after header
Removing Python2.6 CI dependencies to test import failures
Merge pull request #7582 from amras1/ignore-comment-lines

Ignore comment lines in read_csv parsing
Merge pull request #7591 from mcwitt/parse-index-cols-c

ENH: read_{csv,table} look for index columns in row after header with C engine
Merge pull request #6937 from jacobschaer/gbqv2

pandas.io.gbq Version 2
Merge branch 'fix_string_contains_case_insensitive_with_no_regex' of https://github.com/benjwadams/pandas into benjwadams-fix_string_contains_case_insensitive_with_no_regex

Conflicts:
	doc/source/v0.14.1.txt
TST: fix groupby test on windows (related GH7580)
CLN: Fix typo
BUG: {expanding,rolling}_{cov,corr} don't handle arguments with different index sets properly
ENH: change BlockManager pickle format to work with dup items
Merge pull request #7370 from immerrr/blockmanager-new-pickle-format

ENH: change BlockManager pickle format to work with dup items
Merge pull request #7604 from seth-p/moments_diff_index_sets

BUG: {expanding,rolling}_{cov,corr} don't handle arguments with different index sets properly
Merge pull request #7624 from bwignall/quickfix_depr

CLN: Fix typo