Clean up and speed improvement

[bwittman]

Shadow language:

• Added ability to cast to a nullable array

Shadow compiler updates:

• Small garbage collection fixes
• Took away full names from generic classes; instead, full names are constructed on the fly
• LLVM binary files (.bc) are now generated and saved instead of human-readable IR (.ll) files (much smaller files!)
• Speed improvements in the compiler by structuring LLVM optimization more intelligently
• Small performance increases by turning locked, auto-generated properties back into the field load or store they model
• Internal use of memcpy() for copying primitive arrays
• Maven test now correctly runs all the tests on Windows and Linux (Mac not checked yet)

Shadox updates:

• Constant documentation is now correctly printed by Shadox instead of printing strange numbers from antlr
• Documentation added to get or set fields now appears in the property documentation in Shadox
• Shadox correctly links to pages within the default package