Karma tweaks

Minor karma tweaks.

* Drop duplicate ng-html2js sections
* Add polyfill for bind so tests work under PhantomJS 1.9
Could you consolidate this line and the line above it into ```./!(lib|node_modules|bower_components)/**/*.js``` ?
Although I guess app code should always be loaded before test files. It ran fine that way locally, but I wouldn't want to to cause problems later.