mammouth -> php testing tool

Usage:
======
node tests-run.js

note:
- php should be registered as system command
- not tested on Linux, but should work
- for Windows user: if script isn't working on CMD, use powerShell
add some tests
More tests: heredoc and simplified array push
colors added to console
more debug info added to test tool

please note: heredoc*.mammouth tests SHOULD compile. Not sure it's not.
small code cleanup
Merge pull request #25 from korpirkor/master

mammouth -> php testing tool