matplotlib Code

added Michael's dolphin patch

Adding more functionality for interacting with figure windows through
mouse clicks and keyboard clicks. This includes adding a
waitforbuttonpress function, as well as manual contour label location
selection for clabel. The underlying Blocking* classes that drive
this interaction have been moved into a separate file
"lib/matplotlib/blocking_input.py". Also added a changelog entry.

more fixes for numpy svn deprecation warnings

some fixes for numpy svn deprecation warnings

Minor simplification.

Minor docstring fix.

Fix non-linear scaling with pcolormesh and non-Agg backends.

Remove possibility of buffer overrun in last commit.

Fix problem with NaNs at end of path.

Reverting last (accidental) commit.