Fixed Sass import

Updated Gruntfile and style.scss to include import path for bower_components

### Changes

* Added import path to bower_components in the Gruntfile
* Updated the file paths in the main style.scss

### Review

@germanny 
@ericrasch 
@jameswlane 

### Notes

* This removes the crazy number of `../`in the file path and get rid of the Sass warning when compiling.