feat(required-plugins): added required plugins class

To allow for required plugins in a theme, added the TGM Plugin
Activation library as a Bower dependency.
feat(required-plugins): initialized the TGMPA library

Added a check for the TGMPA class, loaded it, and add a new action for
initializing TGMPA. Moved the Advanced Custom Fields dependency to
TGMPA in the child theme in favor of bundling with Hoverboard, which
doesn't actually require ACF to operate.

Added a check for WP's debug mode and activated ACF_LITE if it's off.
Merge pull request #2 from copterlabs/feature/required-plugins

Added TGM-Plugin-Activation for requiring WordPress plugins
chore(version): bumped the version and updated the changelog