Adding a flush_events method to the MacOSX backend
Remove obsolete NavigationToolbar and projection_factory code
PEP8 on tri module source code.
PEP8 on tri* pylab_examples.
Correction to remove deprecation warning for plt.normalize.
Merge pull request #2280 from ianthomas23/pep8_tri

PEP8 on tri module
Merge branch 'deprecations' of git://github.com/ChrisBeaumont/matplotlib into ChrisBeaumont-deprecations

Conflicts:
	lib/matplotlib/backends/backend_wxagg.py
Merge branch 'ChrisBeaumont-deprecations'
Merge pull request #2245 from mdehoon/macosx_flush_events

Adding a flush_events method to the MacOSX backend