Merge pull request #67 from teebrz/master

Tweaks for lib/test, test-runner, etc
- Fixed several bugs in peephole IR transformations
- Added new regression test
	- add c defs for fork(), waitpid(), in lib/stdlib
	- fork() test-runner before load()'ing each test for that fresh vm feeling
	- hacked in support for c funs with arg type void in ffi
	- make sure v8bench tests load the test base