Fixed issue in SLTDeserializer class.

- Commented out addUserProperty function in SLTSaltr class.
Merge branch 'master' of https://github.com/plexonic/saltr-ios-sdk
Fixed issue in SLTDeserializer class.

1. Renamed DeserializerTests to SLTDeserializerTests
2. Added testFlow test case in the test application.