Add bootstrap-select dependency

- Font Size picker depends on 3rd party bootstrap-select plugin
Integrate font size picker into build process

- FIX: renamed all.min.js to all.min.css in the css-min task
- Adding the bootstrap font size picker jQuery plugin code
- Adding the Sass file
- Modified gulp script to configure font size picker into the build
- Adding built css and js files
E2E test integration for font size picker

- Fixed bug regarding deprecated default size param name in instantiation of bfhfontsizes, now is using correct param name "fontsize"
- Added e2e test HTML for font size picker
- Added e2e test JS file for applying casper tests to font size picker
Revised file names of font picker e2e tests
Remove unneccesary import in font size test file
Merge pull request #23 from Rise-Vision/feature/font-size-picker

Font Size Picker integration