Various fixes and tweaks
- starting work on providing real documentation
- allow hook_path to be path/.hooks /or/ path/hooks, preferring the latter over the former
- make list/config use merged local/global git config so githooks config can be stored in either and still function
- move githooks testing hooks to .hooks
- add benchmark times to section/action title line output
- add --tracked option for executing on /all/ files tracked by git
- add :tracked marker for type limiters
- allow sections to be augmented after initial instantiation
- add ability to invert limiter logic