Start Documentation

[alexanderbez]

We've been making some important architectural decisions that will impact the future engineering design and the overall direction of Ethermint. It's vital we start documenting these now so we can look back and know why we made the decisions we've made. In addition, as the project grows larger, this will be even more pivotal.

/cc @jackzampolin @AdityaSripal

[jackzampolin]

Yup! I think we maybe need the following files:

- RPC - /docs/rpc.md
- SDK App - /docs/app.md
- Arch/low level concerns - /docs/arch.md

Thoughts?

cc @AdityaSripal @AlexeyAkhunov

[alexanderbez]

Something along those lines...for now just the major things. Prob docs/intro and docs/spec/transactions