Custom Regex - first steps.
Custom regex!

- Old tests work.
- New variables to handle testing camel case in the settings tests.
Default matches in settings tests.

- Disabled the camel case tests, they're not ready but custom matches
  feature is ready.
Should use live reload of regex match option.

- Most if not all of the settings in Atom do and should take instant
  effect.
:memo: Updates CHANGELOG.md.

- Closes #23.