* Created Database->_age_out_data() to delete records from the database that are old enough to no longer be useful. This is designed to significantly reduce the size of the database, allowing a better focus on performance.
* Changed Database->connect() to default to NOT check for resync, reworking the old 'no_resync' to 'check_for_resync', so that resync checks happen on demard, instead of by default.
* Updated get_tables_from_schema() to now allow 'schema_file' to be set to 'all', which then loads the schema files of all scan agents as well as the core anvil schema file. Fixed a bug where commented out tables were being counted.
* Re-enabled triggering resyncs on 'last_updated' differences.
* Fixed a bug in scan-ipmitool where the history_id column in history.scan_ipmitool_value was incorrect.
* Created a new tool called striker-show-db-counts that shows the number of records in all public and history schema tables for all databases.
* Updated anvil-update-states to detect when a libvirtd NAT'ed bridge exists and to delete it when found.
Signed-off-by: Digimer <digimer@alteeve.ca>