Added Sepia Filter

Add Sepia Filter from Pixastic Library
added some new perf tests
combined Line, Spline, Blob, and Polygon into a single shape for more flexibility.  converted allPoints property into cacheable getTensionPoints method
Removed unsed blurring code
Merge branch 'master' of https://github.com/binoculars/KineticJS into binoculars-master

Conflicts:
	Gruntfile.js
	test/runner.html
Pixelate is tweenable and works with images.
Added documentation for fast blur filter
copying over chunks of code from arrays branch
all unit tests are no passing
Rect tests are now passing
removed before event emitter for attr changes to improve performance.  I don't think it's really needed
fixed up line tests
image unit tests are now passing
more unit tests working, more refactoring
layer tests are now passing
shape tests are now passing.  all factor setters now return this
Added tweening to HSV filter
Fixed jshint errors
Improved color stretch filter
Fixed bug in Flip filter, works on single buffer