Add configuration flag for displaying HUD on space change
Merge remote-tracking branch 'upstream/master'

Conflicts:
	Amethyst/AMConfiguration.h
	Amethyst/AMConfiguration.m
	Amethyst/default.amethyst
Fixing naming scheme, changing bool to BOOL for changingSpace
Adding README entry for "enables-layout-hud-on-space-change" key.
true/false -> YES/NO
Making changingSpace to private.
Merge pull request #149 from leonardt/master

Finer-grained control over layout HUD