Fix VERSION file load errors when running JRuby on Storm

Storm fails to pull in the VERSION file on load of the this gem, so
instead move the value into the protocol_buffers.rb file.
Add Gemfile.lock file to source control and swap simplecov in for rcov (ruby 1.9)
Merge pull request #1 from crashlytics/change-version-for-jruby-issues

Fix VERSION file load errors when running JRuby on Storm