JS hello world app

* App in angularjs
* Tests in karma/mocha
* JS files built with browserify
Add bootstrap
CSV placeholders
Data placeholders
Update bootstrap to 3.1.1
add readme step to install python dependencies
Add mocks
rename - helloworld to contracts
ui-router
Fix spec
add - ballot page
add - todo on api use in controller
Break controllers/services into separate files
Merge pull request #2 from adborden/master

Basic frontend