Send path messages to workers as object

Resolves gh-879
Update chokidar to ~0.10.1
Release 1.7.18
Do not try to process defined, but falsy sourceMap
Remove leading  characters from paths.
Fixed coffee typo that broke the parent folder fix
Merge pull request #888 from Soniflow/topics/remove-require-parent-folder-refs

Remove leading ../ characters from paths.
Update anysort/anymatch
Merge branch 'master' of https://github.com/brunch/brunch

* 'master' of https://github.com/brunch/brunch:
  Fixed coffee typo that broke the parent folder fix
  Remove leading  characters from paths.
  Do not try to process defined, but falsy sourceMap
Bump chokidar to ~0.11.0

Resolves gh-890
Listen for watcher ready event

Resolves gh-889
Release 1.7.19
Bump chokidar to 0.12
Release 1.7.20
Add more documentation on notification config
(cherry picked from commit 83d570d42771c8c0f7d4eae0eae0ec71eae1f778)
Remove stable branch note in stable branch