Niko Watari

Pass metadata along with stream creation command

5

In our program different streams should be handled differently in a non-deterministic way. To determine how exactly each stream should be handled we're passing metadata along with it's creation command....

Update RPC documentation

7

### Description of the issue RPC documentation [here](https://github.com/nknorg/nkn/wiki/JSON-RPC-API-Reference) is kinda old and needs updating according to https://github.com/nknorg/nkn/blob/master/api/common/interfaces.go I'm pledging 1000 NKN to the one who will fulfill this issue ###...