Add Jing
Update libreoffice.rb

Version update 4.1.2 => 4.1.3
Merge pull request #1662 from alexsergeyev/patch-1

Update libreoffice.rb
Guard against unspecified casks in CLI
remove empty app dirs from caskroom on uninstall

previously an install + uninstall would leave around an empty dir with
the app's name. now we clean that up.

refs #1461
Merge pull request #1663 from phinze/1461-remove-empty-caskroom-dirs-on-uninstall

remove empty app dirs from caskroom on uninstall
Use exit codes
Merge pull request #1661 from aah/use-exit-codes

Exit with status of 1 on error
Add HoudahSpot

Spotlight UI.
cut v0.20.0
Kaleidoscope 2.0.2
Document prefpane option
Merge pull request #1665 from Cottser/kaleidoscope-2.0.2

Kaleidoscope 2.0.2
Shortcat 0.6.2
Add a cask for Apptivate.app, 2.1 (12)

This diff creates a new cask for Homebrew Cask for the app called
Apptivate, which can be found at http://www.apptivateapp.com. I followed
the instructions on contributing found on Homebrew Cask to create
this.
Test plan: install using `brew cask install apptivate`, launch
Apptivate using `open -a "Apptivate"`, and check the version and if
everything works.
Merge pull request #1667 from Cottser/shortcat-0.6.2

Shortcat 0.6.2
Merge pull request #1666 from Cottser/prefpane-docs

Document prefpane option
Merge pull request #1664 from Cottser/houdahspot

Add HoudahSpot
Update to latest versioning scheme

As per @NanoXD's suggestion, I've changed the version and the SHA sum to
`latest_version` and `no_checksum`.
Merge pull request #1668 from gnarmis/apptivate

Add a cask for Apptivate.app, 2.1 (12)