Hooks refactored to use HookRunner for every run mode
Hooks made to optionally have arguments
Hooks made to accept javascript functions as executors
`on_change` hook added with `{file: ...}` argument
JS configs allowed
Dynamic config example added
Config JS reader fixed
Merge branch 'better_hooks' of https://github.com/inossidabile/testem into inossidabile-better_hooks

Conflicts:
	lib/config.js
Added missed config options to docs (#86)
Merge pull request #268 from inossidabile/api-docs

Added missed config options to docs (#86)
Merge remote-tracking branch 'origin/master'
0.3.26
Fixed recent breakage.
0.3.27