Fixes #366 - Redmine authorization port

This is a major feature which provides RBAC authorization within Foreman
a mental note to myself - never ever work on large commits

Fixes #145 - Added AuthSourceInternal

Added a password setting facility to the user class for AuthSourceInternal
Switched to SHA1
Changed :ldap to :login
Applied numerous fixes from Ohad Levy
Fixed malformed user page
Switched attr_accessible to attr_protected...

modified the Ensure_not_use_by in Domain model, started the Domain test, and corrected some minor issues in Auth_source_ldap test

Squashed commit of the following:

commit c4382aeea5d72402bcbf3049d3c08f74792ca379
Author: Ohad Levy <ohadlevy@gmail.com>
Date: Thu Oct 15 22:03:26 2009 +0800

disable ldap by default

commit 685baf5f2c78128feebcbeed6910b131a072a81b
Author: Ohad Levy <ohadlevy@gmail.com>...