Removed the dependency of compiler on common. This is done to make compiler self-sufficient so that it is easier to consume by external developers. I tried to replace all instances of assert by simply redefining assert(x) to ASSERT(x), but was getting a lot of compile errors. I still need to investigate that.
Review URL: http://codereview.appspot.com/1461041

git-svn-id: https://angleproject.googlecode.com/svn/trunk@323 736b8ea6-26fd-11df-bfd4-992fa37f6226