Different name for the abstract base class

[ennru]

Right now, the abstract base class for the Event Sourced Entity gets the suffix Interface which is misleading.

[huntc]

I'm unsure that it is misleading... The name itself was leveraged from how we naturally referred to it within the codegen lib. Naming can be tricky of course, but be aware that the interface is needed in the spirit of namespacing protobuf generated code i.e. happy to see it changed, but watch out! ;-)

[ennru]

Misleading in the way that the Java developer in me would expect it to be a Java interface, not an abstract class.
So again, the name is overloaded from the different angles.

[octonato]

I also got that feeling that it should be called AbstractSomething.

And we can call the implementation Something instead of SomethingImpl.

[franciscolopezsancho]

Abstract vs Interface fixed on #99

[franciscolopezsancho]

Impl fixed on #109