Etap 1 - Checklist do oceny

[x] text is in C#
[x] build succeeded
[x] all UT are green
[x] Data layer is clearly stated using language terms only (no database, no file)
[x] Data API is clearly stated
[x] Data API is abstract
[x] Logic layer is clearly stated using language terms only
[x] Logic API is clearly stated
[x] Logic uses only the abstract Data layer API
[x] Presentation layer is clearly stated using language terms only
[x] Presentation uses only the abstract Logic layer API
[x] MVVM and XAMLare applied to implement GUI
[x] reactive and interactive user interaction for user (operator) communication
[x] reactive and interactive programming is used for the communication of layers
[x] Presentation - object model representing process data
[x] Fulfill functional requirements of the task
[x] Unit Test - layers are tested independently using abstract API
[x] Dependency injection (additional framework is not required)
[x] Mock is used for testing purposes (expected but not required)

Podziuu / concurrent_progamming