Srdjan

Results 6 issues of Srdjan

- Add support for datum and redeemer JSON files - Add basic test - Auto-format tests

- Added a `bs` cli tool with db commands and initial migration - Updated readme with example usage for db commands

This PR is a "revisit" of #106. I have just rebased the old branch `feat/memory` with the current upstream. This PR also relates to other issue I've picked up on...

I have reopened PR #106 in #256. This issue is meant to track the open PR's

When master workchain value of -1 is passed down to the lite api value is overflown as generated type is uint32 for some reason.