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):
fikovnik/ShiftIt#296 (comment)

> 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)

window.lua

@@ -0,0 +1,65 @@
+units = {
+	up_small    = { x = 0,  y = -5 },
+	right_small = { x = 5,  y = 0 },
+	down_small  = { x = 0,  y = 5 },
+	left_small  = { x = -5, y = 0 },
+
+	up_med    = { x = 0,   y = -20 },
+	right_med = { x = 20,  y = 0 },
+	down_med  = { x = 0,   y = 20 },
+	left_med  = { x = -20, y = 0 },
+
+	maximum = { x = 0.00, y = 0.00, w = 1.00, h = 1.00 }
+}
+
+window = {}
+function window.up_small()
+	hs.window.focusedWindow():move(units.up_small, nil, false, 0)
+end
+
+function window.right_small()
+	hs.window.focusedWindow():move(units.right_small, nil, false, 0)
+end
+
+function window.down_small()
+	hs.window.focusedWindow():move(units.down_small, nil, false, 0)
+end
+
+function window.left_small()
+	hs.window.focusedWindow():move(units.left_small, nil, false, 0)
+end
+
+function window.up_med()
+	hs.window.focusedWindow():move(units.up_med, nil, false, 0)
+end
+
+function window.right_med()
+	hs.window.focusedWindow():move(units.right_med, nil, false, 0)
+end
+
+function window.down_med()
+	hs.window.focusedWindow():move(units.down_med, nil, false, 0)
+end
+
+function window.left_med()
+	hs.window.focusedWindow():move(units.left_med, nil, false, 0)
+end
+
+
+window_mode = hs.hotkey.modal.new({'ctrl', 'option', 'shift'}, 'w', 'Window')
+window_mode:bind({'ctrl', 'option', 'shift'}, 'w', 'Window Off', function()
+	window_mode:exit()
+end)
+
+window_mode:bind({'shift'}, 'k', window.up_small,    nil, window.up_small)
+window_mode:bind({'shift'}, 'l', window.right_small, nil, window.right_small)
+window_mode:bind({'shift'}, 'j', window.down_small,  nil, window.down_small)
+window_mode:bind({'shift'}, 'h', window.left_small,  nil, window.left_small)
+
+window_mode:bind({}, 'k', window.up_med,    nil, window.up_med)
+window_mode:bind({}, 'l', window.right_med, nil, window.right_med)
+window_mode:bind({}, 'j', window.down_med,  nil, window.down_med)
+window_mode:bind({}, 'h', window.left_med,  nil, window.left_med)
+
+window_mode:bind({}, ']', nil, nil, function() hs.window.focusedWindow():moveOneScreenEast() end)
+window_mode:bind({}, '[', nil, nil, function() hs.window.focusedWindow():moveOneScreenWest() end)