Merge pull request #2 from lakmeer/frontend-build

Frontend build
Added initial tests for helpers.
Added blanket and mocha to package.json
Configured blanket so it gives coverage reports - 100% test coverage on helpers :)
Simplified logic in last() to take advantage of javascript truthiness, fixed braces in getExtension for consistency.
Updated readme.md
Update indent levels in helpres.js
added escapeQuotes helper
Added nodemon as devdep and provided default npm start script for working
Moved test rigging to devdeps and configured npm test script
Completed PoC socket connection with unique channels to each set of screens
Added npm script hooks and updated readme