Create  Gauss.js

Added Gauss filter 
when parent and children are both draggable, the lowest level child draggable property now has priority over ancestors.  Refactored dependency order in thorfile
drag and drop now ends whenever a mouseup or touchend event is detected anywhere on the page
dynamic drag layer setup now does deep copy of Groups and Layers when reconstructing ancestors
added line dash support for firefox and safari
drag and drop dragend event is now fired after drag and drop animation is stopped
mouseup and click events now work correctly after dragging and dropping a shape
new fillPriority attr which enables you to easily toggle between different fill types without having to null out fill attrs and reset other fill attrs
updated docs
Kinetic.Text code cleanup
added text metric caching to improve text drawing performance a bit
Kinetic.Text events now work property
refactored pixel ratio scale logic
implemented new pixel ratio logic, which covers all drawing cases using a canvas context.  The new logic also has better performance than the previous
added support to define pixel ratio with Canvas constructor
fixed up Wedge clockwise logic, and fixed dragOnTop documentation
Merge pull request #237 from pavelpower/patch-2

Create  Gauss.js
Converted test failures to warnings where appropriate
canvas elements now come with padding, margin, border, and background style resets
replaced string literals with numbers where appropriate