If bower is not installed, scaffold fails silently

[micjamking]

Issue

If bower is not installed, when the last step of the scaffold process runs, our dependencies (ie. Foundation) are not downloaded and no output is displayed to the user. This causes an issue the first time the user attempts to run grunt serve or grunt build since the build process expects certain assets to be available (eg. foundation's _settings.scss).

Expectation

Scaffold process should back out and visibly fail if bower is not installed.

Solution

Add check in scaffold for bower dependency.