Feature: Add 'project_update' script

This script is pretty nice.  It updates:

* coffeelint.json
* csslintrc
* jscsrc
* jshintignore
* jshintrc
* kompanee-gitignore
* overcommit.yml
* rubocop.yml
* rubocop_todo.yml
* scss-lint.yml

And it does this in all of the directories in the `PROJECT_HOME` that contain an
existing file of that type.

Closes #21

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Change-Id:     I5fdfe186e867094521f7dd883ff60f9ff9373793
Signed-off-by: Jeff Felchner <accounts+git@thekompanee.com>