Merged changes from ruby/ruby@cb240585319e14
Minor version bump to 0.0.2

* Locked Ruby version to ~> 2.0.0
Merging changes from ruby/ruby@aeb412e419f56
Locking Ruby to version ~> 2.1.0
Basic documentation
Fixed hardcoded header paths
Merge branch 'ruby_2_1'
Fixed gemspec
Fixed gemspec
Merge pull request #2 from arax/master

Bumped master to ruby_2_1