datasnap app user id
adding identifier property instead of id

Signed-off-by: Ryan Medlin <ryan.w.medlin@gmail.com>
Merge branch 'develop' of github.com:datasnap-io/iOS-SDK into develop
identifier property fix was throwing exception during testing

Signed-off-by: Ryan Medlin <ryan.w.medlin@gmail.com>
global_dustinct_id was not being sent anymore

there needs to be support for the app itself to pass this property in as well so i added basic support for that.  refactor needs to properly allow for ANY property to be overridden that is valid

Signed-off-by: Ryan Medlin <ryan.w.medlin@gmail.com>
Merge pull request #11 from datasnap-io/develop

Fixing a few id based bugs and internal Datasnap App Id addition