Merge pull request #22 from philipnilsson/es5

Add ecmascript 5 tests & update to Tasty framework
Added a test-case for NoLineTerminator ASI in post-increment expressions
more ASI test cases
Get rid of `try` in new/member/call expressions. #25
Fix test for 7.9.2-3. Didn't really have a bug, but optmizing use of try gives parse error on better line
Fix to restrict 7.9.2-4 now passes
Fix 7.9.2-5, postfix expressions required to occur w/o linebreak between it an previous expression
Precedence for prefix/postfix operators. !x++ was parsed the wrong way
Fixing function expression lookahead error + operators like !!x now work #26 #27
Judicious use of lexeme combinator. #28
Starting assignment expression refactoring