* Add lein-doo plugin to run cljs tests. This is the new recommended
approach.
* Update project.clj to add cljsbuild config
* Update .travis.yml file to run cljs tests as well.
* Also to speed up travis builds add ~/.m2 dir in cache
To run do:
$ lein do javac, doo phantom test-build once
Note that you'll need phantomjs installed for above to work.
