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
Fixed hardcoded header paths
Fixed gemspec
Fixed gemspec
Merge pull request #5 from arax/ruby_2_1

Added support for Ruby 2.1.x