Adding support to selectively include hidden dot files

Also updated the specs to make use of spec double in place of mocha.
Removed the Gemfile.lock file and gitignore'd it [http://yehudakatz.com/2010/12/16/clarifying-the-roles-of-the-gemspec-and-gemfile/]
Killed sdoc-helpers as it's broken [https://github.com/defunkt/sdoc-helpers/pull/2]
Updated the VERSION file to match the version given in glynn/version

Test added, README updated and this also fixes #13 [https://github.com/dmathieu/glynn/issues/13]