matplotlib Code

Fix problem with call to draw in pong demo. Also make draw use 10 ms timers instead of drawing on idle so that it doesn't peg the CPU.

Remove calls to np.asarray(). This was breaking the use of masked arrays in calls to set_[x|y]data() and is handled appropriately already by set_data().

Small cleanup of logic in handling drawstyle in Line2D

Fix clipping on collections.

devel docs: minor typo

Fix some minor typos in the paths tutorial

Fix some minor typos in the transforms tutorial

Fix some minor typos in the transforms tutorial

added looking glass demo

added path tut