text: Title:  ImportError: cannot import name 'build_model'
  Body: Hi team,
  
  I have installed DeepPavlov version 0.1.0 but unable to import build_model. PFA screenshot for details.
  Configuration: Windows 10
  
  ![image](https://user-images.githubusercontent.com/16195067/80368774-e2da5a00-88aa-11ea-9626-fd8703297131.png)
  