Bugfix for Ambiguous Local Time

Nov 6, 2011 between 1-2am occurs twice and causes ambigous
local time exception.

This fix was suggested here:

http://groups.google.com/group/rical_gem/browse_thread/thread/dbfd63c6d671d486
Fix calendar name throwing an extra : in
fix spec
Merge branch 'bugfix_for_ambiguous_local_time'
Merge branch 'master' of https://github.com/dustacio/ri_cal

* 'master' of https://github.com/dustacio/ri_cal:
  fix spec
  Fix calendar name throwing an extra : in
  Bugfix for Ambiguous Local Time