[TASK] Update Rails to 4.1.8.

Resolves: GET-38
Closes #74
Signed-off-by: Michael Schulze <m.schulze@braingourmets.com>
[TASK] Convert the badges to SVG.

Convert the Travis CI, CodeClimate and Gemnasium badges to SVG.

(Coveralls does not provide an SVG version of their badge.)

Resolves: GET-37