Minor: Change html input type to "email" on sign-in view

Support read-only access for git over HTTP

As long as the username is the user's email address it makes sense to use input="email" helper for the email field. This allows HTML5 capable (mobile) devices to bring up an email input keyboard instead of the default one.

Fixes #2245

Fixes #2246

add help/raketasks to routing spec and search autocomplete

Added link to support forum

fix notify_team on wall

Update installation docs

Closes #2213