Rules JS (execute JavaScript action)

Allows to execute JavaScript as Rules action.
Especially helpful in situations where you'd for example like to track things based on rules.
The origin of this proof of concept can be found here: #467024: Action: Add inline javascript code

WARNING: DO NOT USE THIS IN PRODUCTION OR ONLINE ENVIRONMENT until this is fixed: #2418735: Help to test the security of this module!!!

When upgrading from the former sandbox module please note that the javascript Element now has to be added to the input to be more flexible (Adwords Conversion Tracking, etc.).

This is a proof of concept and we want this module to be security-checked! It's quite possible that this implementation is dangerous and insecure. Let's first check that out before using this module ;)