Fixes #239 - Erases environments and puppetclasses

The fix also includes a page in which the use selects the additions
and removals which they would wish to apply to their database.
Errors are reported and an opportunity is given to reapply the changes.

Fixes #294 Convert settings to a dropdown

Fixes #218 - Search hosts by puppetclass

fixes #372 - add search option for disabled hosts

fixes #371 - disable many hosts at once

refs #369 - removing extra table header

fixes #369 and refactored the summary email view to make it human readable

• Added checkbox for enabling and disabling hosts from edit screen
• Enabling e-mail reports for hosts in downtime
• Added dashboard links to disabled hosts
• Added basic tests

fixed all parenthesize warnings

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...