Review. TODOS added
refactoring
ApiCall implementation. Not finished. Not compilable
ApiCall class created. SLTHttpsConnection refactored.
Lots of methods are moved from SLTSaltr to ApiCall
some TODOs added
saltr added to dictionary
refactoring
parseAssetState method implementation moved from base class into it's children
"System.out.println"s are change with Android's native logging mechanism
changes in log's messages
removed "cmd" parameter from AppData request
 layerId replaced with token
bug fix
refactoring - exceptions
minor changes. runtime exceptions introduced...
onFailure call is removed for addProperties and syncDevFeatures calls.
refactoring - exceptions
All properties that were of type Map<String, String> changed to Map<String, Object>
removed old field saltId
changed type of saltrUserId from UUID to String
onSuccess moved from doInBackground into onPostExecute
asset distribution bug fixed