Helpers: Robust logic for getting solution folder.

In website project,  Solution.FullName  is empty.
Instead of returning null, calling  GetRootFolder
method without parameter also finds solution's
root path.

It was breaking with bundle file-watcher, on
loading solution.
Merge pull request #886 from am11/master

CSS: Throwing in embedded image classifier (#888)
Merge pull request #892 from am11/helpers

Helpers: Robust logic for getting solution folder.
New Bootstrap validator for columns

Check for:
- presence of a parent element having row class
- sum of each type of column must equal 12.
Add 2 tests to bootstrap buttons validator
Merge pull request #896 from GProulx/master

New Bootstrap validator for columns
Bootstrap columns work on any element.
Merge pull request #899 from GProulx/master

Bootstrap columns work on any element.
Adding JSON schema references
Adding icon to .jscsrc files
JSON: Adding coffeelint.json support