Removed Gemfile.lock from the repository

Removed Gemfile.lock from the repository according to what Yehuda says
here:
http://yehudakatz.com/2010/12/16/clarifying-the-roles-of-the-gemspec-and
-gemfile/
Updated eventmachine dependency to 1.0.0
Merge pull request #1 from nessche/upgrade_to_eventmachine_1.0.0

Upgrade to eventmachine 1.0.0