Stop evaling shared gemfile
Bump version
Remove reference to backports from flog task
Run specs before metrics and mutant in the ci task
Consider TRAVIS_BRANCH env variable when determining branch

The previous approach does not work with detached HEADs.
Merge pull request #43 from lgierth/branch-detection2

Consider TRAVIS_BRANCH env variable when determining branch
Fix sum to use inject(:+)
Fix rubocop and mutant to not raise an error under ruby 2.1
Upgrade gem dependencies
Add jruby-head to the list of rubies that are allowed to fail

* This should hopefully be a temporary fix
Remove ruby-head from list of rubies allowed to fail

* Some long-standing issues have been resolved allowing the build to
  finally pass with ruby-head again.
Merge branch 'master' into develry-rename