[client][ios][offline] add extra columns to local store
Merge pull request #487 from hasankhan/iostablekind

[client][ios][offline] add extra columns to local store
[client][managed][offline] insert should throw if the item already exists #491
[client][managed][offline] rename queryKey to queryId
Merge pull request #496 from hasankhan/insertconflict

[client][managed][offline] insert should throw if the item already exists #491
Merge pull request #498 from hasankhan/queryId

[client][managed][offline] rename queryKey to queryId
[client][managed][offline] removed the 'for more information' link for incremental sync doc comment
[client][managed][offline] local store integration test fixes