Backend: http proxy to gitbase

[bzz]

Implement 2 endpoints

1. Query: POST /query

req: { query:””, limit: N }
res: { meta:{..table headers..}, data:[row,...,], 
        status:{ elapsed, error/warning } 
}

No streaming yet. Include UAST -> JSON conversion.

2. Tables: GET /tables

res:  same

And two more endpoints as just a mocks

1. UAST: POST /parse

 req: { code: “”, filter: “” }
 res: { uast: “”, status: {} }

2. Filter: POST /filter

  req: {} //need to include a binary PB
  res: { uast: “”, status {} }