Prefix keywords with underscore in tokTypes object
Run a lint pass, clean up lots of small issues
[loose parser] Refine closing heuristic for expression lists

Issue marijnh/tern#171
Mark release 0.3.0
Release 0.3.1 to fix release-making-script screwup in 0.3.0
Bump version number post-0.3.1
Merge branch 'master' of https://github.com/marijnh/acorn

Conflicts:
	acorn.js