AngularJS Charts page with Pie and Bubble chart.

- Added Pie Chart with Legends

- Added Bubble (overlay) Chart

- X-Scale generation is abstract

- Bower dcjs & angular-dc update (pointing to master branch)
Frontend theme change, search query string support and other fixes.

- Using Flatly theme for bootstrap

- Charts CSS changes (SVG Fills)

- Home/Search results alignment

- Search page now have support for state preserve and query string.

- Support for URL Route change w/o page reload.
Support for Chart visit tracking and default param on Home screen.

- Added POST api/visited

- TrackingInfo with JSON data

- Tracker service and logging
Merge branch 'feature/visualisations' into feature/angular