Log Message:
Update ruby-listen to 2.10.0.

v2.10.0
@e2 e2 released this on 27 Mar, 6 commits to master since this release

Major changes

* #304 - lock to Cellulloid 0.16 (if you need Celluloid 0.15, use Listen 2.9.0 \ 
and ask for backports if necessary)

Bugfixes

* #301 - avoid BSD adapter crash when watched file doesn't exist

Improvements

* #303 - allow listen tool to watch multiple directories