Models code generation#2

Merged

bogdandm merged 4 commits intomasterfrom

models_code_generation

Sep 25, 2018

Commits on Sep 21, 2018

Base code generation
bogdandm
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Commits on Sep 23, 2018

Replace chevron with Jinja;
bogdandm
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Commits on Sep 24, 2018

Tests of models generation;
bogdandm
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Commits on Sep 25, 2018

Disable some functionality of compose_models because of broken typing.ForwardRef
bogdandm
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