[Add]: Hard work
[Add]: Hard work 2
[Fix]: Not initialized array
[Mod]: Right placed comments
[Mod]: Added async fetching
[Mod]: Named cell reuse identifier
[Fix]: Wrong sections and rows detection
[Mod]: Moved mapping objects from json to clienst side

It's too complex to implement all combinations of API methods with
parameters. Lets client do it itself.
[Mod]: Some changes inside storyboard