* wip: updates the hash interface
* updates hash unittests
* exposes appendLength
* updates proof gen interface and the unittests
* enables test, fixes proofGen and verify utils and unittest, beautifies the code
* removes int size from mem index type
* enables all the rln tests
* adds documentation of two private procs
* documentation for the appendLength
* minor clean up
* adds clarificaltion on the endianness of input length
* Delete .DS_Store
* Bump nim-chronos and fix exception tracking issues
* Bump other Nim submodules to latest
* Fix repeatMessage properly through proc type fix in nim-eth
Also add and use unittest2 through testutils to avoid extra
annotations.
- Move Waku RPC code from Nimbus + necessary code around it
- Add Waku RPC test which is a copy of the Whisper RPC test
- Some renaming
- Remove nimbus submodule