BF: removed mouse window exclusive on OSX

- already removed from other OS's. Since integration with psychopy there
is no reason iohub needs to have window related functionality that can
already be done in pyglet.
Merge branch 'master' of git://github.com/psychopy/psychopy
Merge pull request #443 from isolver/master

BF: removed mouse window exclusive on OSX from iohub
ENH: switching wx.Color to wx.Colour (for compatibility with wx 2.9.xx)
ENH: Window sends a 'stay awake' signal during flip (win32 and OSX)
FF: cedrus button box code generation from builder