Initial commit
Add IMGKit gem.

Adds the IMGKit gem to snapshot as a low-res JPEG image the stylized code snippets.
Generate snippet snapshot and sends it to the user.

Using IMGKit we generate a JPEG-version of the code snippet and we serve
it to the user that requested the image version of the code sample.
Add Pry gem.

Adds Pry runtime developer tool to assist development.
Apply consistent use of code conventions across the codebase.