Various syntax updates

[jtbandes]

• nil literal
• coalescing operator
• preliminary support for parameter names
• more (and more up to date) builtin types

[jtbandes]

This may conflict with @natecook1000's #13, in particular 10a5b18. My approach was to do a regex find-all in the (2.0) standard library generated header, so the collection types are all included along with other structs.

[infininight]

Pulled, thanks!