[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
Closes #75
Signed-off-by: Michael Schulze <m.schulze@braingourmets.com>
[TASK] Update all gems.

Resolves: GET-39
Closes #76
Signed-off-by: Michael Schulze <m.schulze@braingourmets.com>