Add window movement hotkeys

Create a new mode activated with <C-M-S-w> that activates hotkeys to do
window management. Add hotkeys to move windows up, down, left, and
right. One set of hotkeys to move by small increments and another set to
move by slightly larger increments.

Based on code from 'derekwyatt' (https://github.com/derekwyatt):
https://github.com/fikovnik/ShiftIt/issues/296#issuecomment-438386501

> units = {
>   right30       = { x = 0.70, y = 0.00, w = 0.30, h = 1.00 },
>   right70       = { x = 0.30, y = 0.00, w = 0.70, h = 1.00 },
>   left70        = { x = 0.00, y = 0.00, w = 0.70, h = 1.00 },
>   left30        = { x = 0.00, y = 0.00, w = 0.30, h = 1.00 },
>   top50         = { x = 0.00, y = 0.00, w = 1.00, h = 0.50 },
>   bot50         = { x = 0.00, y = 0.50, w = 1.00, h = 0.50 },
>   upright30     = { x = 0.70, y = 0.00, w = 0.30, h = 0.50 },
>   botright30    = { x = 0.70, y = 0.50, w = 0.30, h = 0.50 },
>   upleft70      = { x = 0.00, y = 0.00, w = 0.70, h = 0.50 },
>   botleft70     = { x = 0.00, y = 0.50, w = 0.70, h = 0.50 },
>   maximum       = { x = 0.00, y = 0.00, w = 1.00, h = 1.00 }
> }
>
> mash = { 'shift', 'ctrl', 'cmd' }
> hs.hotkey.bind(mash, 'l', function() hs.window.focusedWindow():move(units.right30,    nil, true) end)
> hs.hotkey.bind(mash, 'h', function() hs.window.focusedWindow():move(units.left70,     nil, true) end)
> hs.hotkey.bind(mash, 'k', function() hs.window.focusedWindow():move(units.top50,      nil, true) end)
> hs.hotkey.bind(mash, 'j', function() hs.window.focusedWindow():move(units.bot50,      nil, true) end)
> hs.hotkey.bind(mash, ']', function() hs.window.focusedWindow():move(units.upright30,  nil, true) end)
> hs.hotkey.bind(mash, '[', function() hs.window.focusedWindow():move(units.upleft70,   nil, true) end)
> hs.hotkey.bind(mash, ';', function() hs.window.focusedWindow():move(units.botleft70,  nil, true) end)
> hs.hotkey.bind(mash, "'", function() hs.window.focusedWindow():move(units.botright30, nil, true) end)
> hs.hotkey.bind(mash, 'm', function() hs.window.focusedWindow():move(units.maximum,    nil, true) end)

1 files changed, 2 insertions, 0 deletions

diff --git a/init.lua b/init.lua
index 28e7bd2..4760509 100644
--- a/init.lua
+++ b/init.lua
@@ -1,6 +1,8 @@
 -- Enable command line tool (http://www.hammerspoon.org/docs/hs.ipc.html)
 require("hs.ipc")
 
+require('window')
+
 
 -- Shortcuts to focus tabs in Terminal
 terminal_app = hs.application.applicationsForBundleID('com.apple.Terminal')[1]