Revert "Generated the Skill model"

This reverts commit 827bcb67655bcef64d81cf2a87d37239b394f077.
Revert "Generated the Course model"

This reverts commit c536f8d0130d5bed46ea6f908501cf9cac49522c.
Revert "Generated user model with discovery attributes"

This reverts commit ef95778d9f389eb8ed5351da739af3a9ba7e3b49.
Revert "Removed high_voltage"

This reverts commit bacc57e47d754b340617358a2a1ad5c27690c226.

Conflicts:
	Gemfile
	Gemfile.lock
Revert "Import font-awesome"

This reverts commit 014f9ac66676ac338edd2f126e6754aaa93c0c14.