Load Bootstrap via Bower

TODO:
- Update README
- Use grunt-bower-task?
Merge branch 'bower' into 7.0.0
Specific Bootstrap version
Load jQuery from Bower
Load Modernizr from Bower, lean build with Grunt
Better LESS organization
Ref #867 - Add Respond.js (not enqueued by default)
Added recent changes to changelog.
Updated readme to reflect that this project is a derivative of roots/roots.
Merge branch 'feature/readme-cleanup' into dev/josh

* feature/readme-cleanup:
  Updated readme to reflect that this project is a derivative of roots/roots.
  Added recent changes to changelog.
Merged new bower features from roots/7.0.0 branch.

Merge commit '11930de7edc7af1bab3df73e6fe82dc92ddeb5fe' into feature/bower

* commit '11930de7edc7af1bab3df73e6fe82dc92ddeb5fe':
  Ref #867 - Add Respond.js (not enqueued by default)
  Better LESS organization
  Load Modernizr from Bower, lean build with Grunt
  Load jQuery from Bower
  Specific Bootstrap version
  Load Bootstrap via Bower

Conflicts:
	Gruntfile.js
	assets/css/main.min.css
	assets/scss/app.scss
	lib/scripts.php
	package.json
Merge branch 'feature/bower' into dev/josh

* feature/bower:
  Ref #867 - Add Respond.js (not enqueued by default)
  Better LESS organization
  Load Modernizr from Bower, lean build with Grunt
  Load jQuery from Bower
  Specific Bootstrap version
  Load Bootstrap via Bower
Fixes grunt config to reflect new location of foundation scss and js files.

Foundation files deleted from repository.
Added todos
Merge pull request #3 from QCCreative/dev/josh

Dev/josh