Ballast 2.4 released

CHANGES
- Added --stdin/--stdout to agent to allow data propagation via ssh hops
- Added --no-wait to agent to skip random wait on manual invocation
- Added --add to server to allow data insertions from external sources
- Added --purge to server to allow manual data removals
- Added built-in Twofish encryption for more sensitive info
- Added config setting root_hook to allow collection of root-level info
- Added config setting data_host_any for servers with multiple interfaces
- Added config setting use_fqdn to strip or not strip domain from hosts
- Fixed inadvertent timeout during ingestion of large load data
- Fixed missing Time::Zone sometimes needed for embedded Date::Parse