Merge pull request #2 from ethul/feature-roy-update

Updating bundled Roy to the latest from git.
Remove `console.log` from the test cases, so we are runtime agnostic.
Remove unneeded gems from the Gemfile.
Add travis ci.
Update README.md
Add rake.
Update travis ci link
Updating the bundled roy compiler

Note that the bundled Roy compiler has been created from the following
commit on the Roy repository:

pufuwozu/roy@8c2986c89af75c95bd3c238e14e6689e17b9b710