Add model name to the summary method

[zaleslaw]

Our models could have names, but the current version of summary method (for both, Sequential and Functional models) doesn't support model name displaying.

The PR should include:

• model name support for both, Functional and Sequential model
• the missed model name case is handled correctly
• SequentialCompilationTest.summary should be updated for validation model name
• Test for the Functional model summary is added (you could use here model like ToyResNet)
• (Optional) Refactoring of both summary methods (in Functional and Sequential models)

[dosier]

I could do this one :)

[dosier]

@zaleslaw to what extend do both summary methods have to be refactored? E.g. does the method signature have to change at all?

[zaleslaw]

I've changed the ticket description regarding refactoring: the refactoring will be optional, the API is not under stability guarantees and could be changed.

The refactoring is just an idea, looks like it could be refactoring, but it's your choice as a contributor: propose the refactoring (with minor changes in the signature that doesn't affect all examples and tests) because there is some copy-paste there and common logic, but PR could be merged and without refactoring

[dosier]

@zaleslaw do the above commits cover the first 3 points in this issue sufficiently? Or is this not what you meant. And I can look into the refactoring yes.

[zaleslaw]

I've added the Contributing Guidelines. Please check this.

[zaleslaw]

You solution is simple and solves the problem

[dosier]

Maybe the refactor and writing a test is better suited as a part of #135 than this issue @zaleslaw ?

[zaleslaw]

I suggest do things step by step, the final form of model summary is unclear and there are a few moments related to logging, jupyter integration and so on.

I suggest to finish this ticket and if the form of summary will be changed, we will not ignore the modelname