Adding more keys

Mapped common key symbols to key-code -- from https://github.com/gtramontina/keyvent.js, which I borrowed from https://github.com/madrobby/keymaster :-)
Merge pull request #3 from gtramontina/patch-1

Adding more keys
license; component support
Merge branch 'master' of github.com:namuol/cheet.js
readme; bower.json; license in main
mousetrap ftw
Automated tests.

make && make test
Adding .travis.yml