* Moved System->is_local to Network->is_local, and System->ping to Network->ping.
* Added a check to tools/striker-get-peer-data that will report if the target has Internet access or not.
* Cleaned up the form that prompts the user to enter their Red Hat credentials.
* Updated tools/anvil-manage-keys (and related code) to no longer distinguish by user. If a target is flagged as changed, it is removed from the root and all user's known_hosts files.
* Updated Storage->write_file() and ->update_file() to accept the 'backup' parameter to control if an file that exists is backed up before being updated/replaced.
Signed-off-by: Digimer <digimer@alteeve.ca>