add token to push device
add device attributes
bugfix PUT/POST on save

if uuid is set to '' it is set and a post is never called
if it is set to null it is not defined and the first saved calls a post
add apnsProvider type
add apnsProvider tests
update version number
bugfix with calling success
update readme
add mCAP.Component

implements a version number that gets increased on every save
mCAP.PushApp now inherits from mCAP.Component