Fixes #7591 - changed Sign out to Log out to fix inconsistent terminology around Login vs Sign Out

refs #2127 - instantiate exception and pass i18n arg correctly

fixes #2127: added support for root password hashing other than MD5

Fixes #7592 - flipped the order of logged-in user menu

Fixes #6999 - protect user logout against CSRF requests (CVE-2014-3590)

To avoid CSRF, logout is changed to be a POST request so
protect_from_forgery checks the CSRF token. However, in Rails 3 the only
strategy available is to nullify the session of the attacker....

Fixes #2232 - speed up Host view via AJAX

Fixes #7418 - fixed capitalization for some AR errors

fixes #7299 - do not display 'Mismatches Report' button when no view-host

fixes #7213 - exclude plugin permissions from seeds test

Fixes #4596 - Change parent of host group via AJAX

Reparenting host groups requires submitting the form to see the changes
nowadays, this fix makes the host group model inherit all properties
from the parent and show them in real time.