Read service version from Capistrano REVISION

Enables the reading of the service version from the REVISION file created by Capistrano deployments.

Align with semantic versioning

Loga is now used in production.
This release does not include new feature or bug fixes.

Fix warning

from #68 and #69

Automatically push generated gem to gemfury for tags

v0.0.13

Merge pull request #66 from FundingCircle/push-tagged-versions-to-gem…

Make encoding resilient to incompatible characters

v0.0.11

Version bump