Fixed:
Filter.Append was reusing 'this' instance when clone was required causing blank screen to be displayed in some situations when input / output size changes.

Refactoring:
Pulled ConfigurableRenderScript.cs from Shiandow's experimental branch.
Refactored all relevant scripts to inherit from ConfigurableRenderScript class.
Fixed Filter.Append crashing out with stack overflow in some situations.
Added example of InterlaceFlags usage in MyRenderScript.cs.
Merge pull request #18 from zachsaw/work

Pulled from work branch