ENH: add HTML Help builder option
Build gallery also for HTML Help docs
Merge pull request #3323 from MrLeeh/patch-2

BUG : fixes py3k unicode issues

Replaced unicode() function by six.text_type
Workaround for Sphinx not escaping ``_`` (underscore) for tex output
Merge pull request #3329 from lennart0901/fix_#3326

Workaround for Sphinx not escaping ``_`` (underscore) for tex output
Merge pull request #3325 from cgohlke/patch-1

ENH: add HTML Help builder option
Merge pull request #3324 from mdboom/backend-agg-crash

BUG : fixes memory corruption issues with zero-size rasterized artists

Fix #3304.
Restore compatibility with Python 3.2
Merge pull request #3331 from cgohlke/patch-2

Restore compatibility with Python 3.2
BUG : don't assign color to flier props if None

Close #3336
Fix mathmpl images not showing in HTML Help (CHM)
AGG link changed. Also fix other doc warnings
Add lines_api.rst and patches_api.rst
Add text_api.rst
Merge pull request #3339 from cgohlke/patch-3

DOC : fix paths in MS helphtml output

Fix mathmpl images not showing in HTML Help (CHM)
BUG : guard marker from sym parsing in bxp

add a guard against `None` returned as `marker`
by `_process_plot_format(sym)`.
Added image and offsetbox apis to the API list.
Merge pull request #3342 from WeatherGod/14xDocFixes

DOC : fixed links, un-nested artist API docs

AGG link changed. Also fix other doc warnings
TST : added test for bxp

Adds test for case where `sym` kwarg to `bxp` does not
specify color
Merge pull request #3337 from tacaswell/bxp_flier_colors

BUG : don't assign color or marker to flier props if None