Use the ablefile's basedir when using includes.
Rename tasks to plays to allow use to use subcommands.
Refactor command to allow a list of plays to be passed in. (subcommands).
Add basic subcommand class, which is currently just a wrapper around a play.
Combine get_vars_files with get_vars
Big refactor to move logic from out of ablefile into command and subcommand classes.
Rename subcommands to plays for simplicity.
Merge in data from command into plays.
merge command data with individual plays
Add module and action plugin paths so we can use able versions.