Design GOLEM facade API for simple running

[gkirgizov]

Currently running the framework requires setting many parameters and understanding a lot of technical details. For example, look at current minimal simple_run.py -- it is too complicated.

GOLEM facade should be analogous to FEDOT API and require a minimal set of user parameters, if any.

Connected issues:

• must have: Consider adding "evolution scenarios" for different kinds of graphs #142
• Implement API Parameter Facade #23

Some specific thoughts on parameters:

• Adapter: possibly, by default can be used NetworkX adapter, as it's most likely familiar lib for new users.
• Possibly, initial population, when not set, can be generated automatically
• Tuner should be integrated into workflow, so that users can enable it with simple GOLEM.run(tuning=True)
• If population_size and graph constraints (max graph size, graph breadth etc.) are applied automatically -- all important parameters of the search space should be Logged so that user is informed about what's happening.