use catbuffer to generate the SDK API

[tonowie]

nemtech's catbuffer is to be used to generate objects for serialization. move to it and adjust the code/tests to use new definitions.

[tonowie]

initial tests show that catbuffer code is very different from what we have and I am removing this from the initial release. it should go to the 1.0.0 release though after it is stabilized

I have forked catbuffer to https://github.com/bad-weather-corp/catbuffer and will attend it as time permits

[tonowie]

ok nemtech has moved to the catbuffer serialization. I misunderstood the intention behind it because what nemtech did was using it solely for serialization => no "regenerate on change and you are done" but "regenerate on change and then refactor all your code referencing what was generated". That lowers the bar for the use of the catbuffers a lot because API for SDK remains the same

I think I will get back to this once dragon release is out