Fix login URL for teams with SSO
Fix login URL for teams with SSO

Slack teams have the option to turn on login via Google auth, which results in the inital page not including a login form.  Adding the query-string parameter `no_sso` gets you to the actual login page.  I'm making the assumption that including that parameter does not break the loing for teams that _don't_ have Google SSO turned on.
lambtron/emojipacks,lambtron/emojipacks,bdobyns/emojipacks,bchalls/emojipacks,tanookiben/emojipacks,bchalls/emojipacks,tanookiben/emojipacks,thbaumbach/emojipacks-local,tanookiben/emojipacks,bdobyns/emojipacks,bchalls/emojipacks,tanookiben/emojipacks,lambtron/emojipacks,bdobyns/emojipacks,bchalls/emojipacks,lambtron/emojipacks,bdobyns/emojipacks,tanookiben/emojipacks