Add mouse settings
Add setting to allow standard function keys
Manage interface sound effects

Adding `osx::sound::interface_sound_effects` to toggle interface sound
effects off and on.
Merge pull request #49 from hakamadare/interface_sound_effects

Manage interface sound effects
Merge pull request #45 from bbeck/master

Add setting to allow standard function keys
Merge remote-tracking branch 'upstream/master' into mouse

Conflicts:
	README.md
Merge pull request #38 from xdissent/mouse

Add mouse settings
Fix README.md
Merge pull request #53 from andrewgarner/patch-1

Fix README.md
Add recipies for configuring hot corners
Merge pull request #54 from CedricFinance/hot_corners

Add recipies for configuring hot corners
update travis badge and dependancy requirements
Merge remote-tracking branch 'upstream/master' into jstillwell/osx_prefs
Adds class spec for osx::global::tap_to_click