Added DNModelWatchObject/Objects

Signed-off-by: Darren Ehlers <me@darrenehlers.com>
Updated podspec to 0.0.19

Signed-off-by: Darren Ehlers <me@darrenehlers.com>
Merge branch 'refs/heads/modelwatch_objects'

Signed-off-by: Darren Ehlers <me@darrenehlers.com>

Conflicts:
	DoubleNode.podspec
Updated podspec to 0.0.20

Signed-off-by: Darren Ehlers <me@darrenehlers.com>