Update Site.pm

Is this how you'd add github in this file? Github.pm to follow.
Create Github.pm

To add Github as an option for the account linking.
Update Site.pm

Missing quote; thanks Dre!
( Bug 1101 ) Embed imgur album

Fixes bug 1101.
Merge pull request #1098 from azurelunatic/patch-2

Create Github.pm
Merge pull request #1099 from azurelunatic/patch-1

Update Site.pm
Merge pull request #1102 from hotlevel4/bug1101/whitelistImgur

( Bug 1101 ) Embed imgur album
Make sure that we don't try to get session cookies for embed domain

Leads to infinite loop of redirects
Make sure to return OK status from controller
Merge pull request #1103 from afuna/embed-fixes

Fixes to converted embed
Make consistent creating of the authas form

* prefered is to pass in authas => 1 or authas => { show_all => 1 } (or
  whatever args) to controller(). For foundation pages, use
  $rv->{authas_form}, where the authas is wrapped in an actual form. For
  non-foundation pages, use $rv->{authas_html} which only has the select
  HTML. This means that we don't have to worry about checking for
  authas, so long as we make sure to use $rv->{u} versus $rv->{remote}
  where it matters

* remove now-obsolete plugin authas function
Merge pull request #1104 from afuna/authas-controller

Make consistent creating of the authas form
Make sure we include jquery ui theme for journal pages

(this used to be included everywhere in ljlib.pl, but since we don't
want it on site pages anymore, do this in S2.pm)
Merge pull request #1105 from afuna/dialog-bg

Make sure we include jquery ui theme for journal pages