documentation tweak

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@palm.com>
do not attempt to set empty paths

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@palm.com>
separate controller support into a mixin and correctly run mixin initialization post initialization of target object

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@palm.com>