BUG : fix fetch of freetype version during build

Use freetype-config --ftversion flag to get freetype version (previously
using freetype-config --version which returns libtool version).
DOC : added whats_new entry for Qt5 backend
restored default boxplot style and respect for the sym kwarg
fixed typos/formatting in docstrings
clean up whitespace
BUG : fix errors when using fliers

doplot for horizontal boxes (internal bxp helper function) assumes that
it will be passed an even number of positional arguments which it swaps
pair-wise.  The code to draw the fliers also passes in a format string
which breaks the assumption.

 - re-worked how `bxp` deals with the `sym` input
 - minor pep8
BUG : handle colors passed in via sym in bxp

If the user passes is the string 'ro' assume they want filled circles.
This is also the old behavior.
DOC : added warning to doc of get_window_extent

This is in response to issues raised in #2831.

Closes #3055
BUG : fixes broadcast errors with np 1.9

 fixes some of the issues raised in #3186
BUG : fix the rest of the errors from np 1.9

 Addresses the remaining errors from #3186
Create 538.mplstyle
Create bmh.mplstyle

Update 538.mplstyle

Update bmh.mplstyle

fixing line in bmh.mplstyle
TST : drop 3.2, add 3.4
DOC : tweaked references to python versions
remove dpi/figsize settings, rename to fivethirtyeight
DOC : fixed grammer
Fix plot directive when used with multiple options.

The existing template produces newlines between options, which were
confusing the reST parser. By fiddling with whitespace control, the
template can be made to put things together correctly.
BUG : raise exception in subplot if num out of range

if subplot(rows, cols, num) is called with num not in
0 < num <= rows * cols raise a ValueError

close #3166
Properly deprecate num=0 in subplot related functions
Added 'PyQt4v2' to valid values for backend.qt4

Matching to what is allowed by the code in qt4_compat.py

Closes #2977