Support TOPIC command
Minor tuning
Support PASS with one param, rewrite tests
Merge pull request #36 from flowdock/topic-command

Topic command
Added a comment about why we do funny stuff in the PASS command.
Merge pull request #35 from flowdock/pass-v2

Support PASS with one param, rewrite tests
Merge branch 'master' into motd-refactoring

Conflicts:
	lib/command_views.rb
	lib/commands/authentication_helper.rb