Module test implementation using the javax.script API + JDK8's Nashorn js engine
Make Eclipse (4.4RC3) find the Java 8 VM

Compiling the project, and running the interpreter from within Eclipse,
should now handle finding the VM automatically (using the java 8 VMs
registered in Window -> Preferences:  Java -> Installed JREs)
Handle javascript exceptions "gracefully"

The error message itself might need a bit of tweaking, but it's good to
at least have interesting information from the JS engine
- Added module test suite (run via MuteInterpreter)
- Added "has" and "get" utility methods for module scripts on value collections
Clean-up and remove Rhino dependencies

- Removed Rhino support code and libraries
- Merged Nashorn specific copies (build and jar) into original file
- Updated interpreter jar (not strictly speaking necessary)
- Fixed a typo in an error message
Merge pull request #1 from lqd/master

Module test implementation using the javax.script API + JDK8's Nashorn js engine