Merge pull request #1884 from mdboom/pycxx-system-library

incorrect linkage if system PyCXX is found
Removed the import from cbook into the matplotlib name space in __init__
and changed all cases of

from matplotlib import MatplotlibDeprecationWarning as mplDeprecation

to

from cbook import mplDeprecation
tweaked intra-package imports from cbook
Merge pull request #1924 from tonysyu/gallery-cleanup-rebase

MEP 12: Gallery cleanup and reorganization
Tidied up some of the documentation.
Updated some of the examples.
Actions by @NelleV.
Further enhancements and simplifications.
Fix #1949: Be explicit about needing Gtk 3.0 when importing gi so we can provide a better error message
Merge pull request #1918 from pelson/updated_v1p3docs

Tidied up some of the documentation.
Tidy up the matplotlib.__init__ documentation.
Add gtk3cairo, gtk3agg tests to template
Merge pull request #1949 from mdboom/setup/gi-explicit-version

Build failes under ubuntu 13.04
Fixed background colour of PNGs saved with a non-zero opacity.
Merge pull request #1946 from tacaswell/mpldeprec_imports

re-arrange mplDeprecation imports
Have a workaround if a Python 3 user has pyparsing <= 2.0.0
Cleanup formatting of setup messages
Fixes issue #1960. Account for right/top spine data offset on transform when doing spine.set_position(). Also includes a testcase for the data locations.
Make the travis output slightly quieter, particularly when installing dependencies.  Add Python 3.3 to the tests.
Merge pull request #1965 from mdboom/simplify-travis

Make the travis output quieter on v1.2.x