Create unit test file for datastore api
Add unit test class declaration and friend class it in DataStore
Update vcxproj files
Add method getAllTask()
Rearrange method declaration and definition for better readability
Add test for getAllTask
Storing stuff to switch branch
Merge branch 'ds-internal' into datastore-api

Conflicts:
	You-DataStore-Tests/datastore_api_test.cpp
Implement getAlTask for DataStore
Modify test to be independent of other method
Add InternalDataStore as member variable of DataStore
Change return value of getAllTask to value, change implementation