Merge pull request #1 from dadoonet/master

Update maven assembly plugin version to 2.3
add license and repo
upgrade to rhino 1.7R4
release 1.2.0
move to 1.3.0 snap
Move to Elasticsearch 0.21.0.Beta1
Due to refactoring in 0.21.x we have to update this plugin
Closes #3.
release 1.3
move to 1.4 snap
Move to Elasticsearch 0.90.1
And update licence
Closes #5.
Make log4j an optional dependency
...as it is in the main elasticsearch pom.xml. This is useful for people who want to use slf4j/logback instead of log4j.
Closes #2.
prepare release elasticsearch-lang-javascript-1.4.0
prepare for next development iteration
Create CONTRIBUTING.md
update headers
Move tests to elasticsearch test framework

Closes #10.
Move tests to elasticsearch test framework

Relative to #10.