Removed Gemfile.lock
Removed Gemfile.lock

Gemfile.lock was correctly in the .gitignore file, but was also committed to the
repository.  See
http://yehudakatz.com/2010/12/16/clarifying-the-roles-of-the-gemspec-and-gemfile/

Furthermore, it was locked to a version of memcached that I could get to compile
on Lion.

dblock/rack-cache,dblock/rack-cache,mezis/rack-cache,mezis/rack-cache