Permission added for manual xml edition

As it can override other permissions
added an XMLRPC SSL option to configuration

Added a note that you must use a SSL proxy to do that
Add xmlrpc ssl configuration option in archipel.conf
Fix #634 - Avoid empty values in configuration file
Revert "Permission added for manual xml edition"

This reverts commit 73f2d66c1e198e7de6ef221f3048e69e1810aafe.
Merge pull request #667 from CyrilPeponnet/security-improvements

Security improvements and bug fix
Fix a crash when attaching a block device and wwhen there are no disks declared
Merge branch 'master' of https://github.com/ArchipelProject/Archipel
Fix small bug regarding migration. Disalow launching the command if VM is not defined, and enable the controls according to the permissions
Add an option to force JID domain, so users only have to enter their username. ref #654
Remove ToolbarMigrationModule because it duplicate other UI features, and it is not maintained anymore. Bye module!
Update version of Cappuccino
Sync loc
Remove some animations
Simplify ui a little
Remove useless string
Various small UI updates
Remove old textured bgs that makes loading slower
Update roster background
Small UI Updates