Type-hint double/single assignments with '+' in JS to try and ensure that they stay as floating point instead of integral (hopefully solves some type information problems where JS runtimes force '0.0' to integral)
Add some double type hints to the XNA vector types
Browser.Loaders XHR wrapper throws if you attempt to load assets from file://.
StructGenericParameter seems to pass for the correct reasons now. Neat.
Expand metacomment support so you can set jsil configuration options in the source file for tests.