[pt]Integration android app with Backend

[Niyaz-ik]

Tasks

• [x] #37
• [x] #32
• [x] #74
• [ ] #75

Acceptance criteria

1. Authorization must proccess via servers.
2. All trade points and menu positions must be loaded from json files got from back end.

Additionally File with all requirements and the description of authorization process is in General, files.