* remove redundant gcsafe/raises
* rework async raises to chronos 4.0 where this was not yet done
* streamline logging between http/socket/ws
* don't log error when raising exceptions (whoever handles should log)
* debug-log requests in all variants of server and client
* unify ipv4/ipv6 address resolution, with preference for ipv6
* fix server start so that it consistently raises only when no addresses
could be bound
This addresses two items:
- Use ApplicationError instead of InvalidRequest for custom
application errors. Avoiding confusing regarding the usage of
InvalidRequest (although the actual error code used could/would
be different).
- Allow for defining an optional data object that gets returned
in the error response, as per json-rpc specification.
* Upgrade rpc router internals
* use new chronos asyncraises
* Fix style mismatch
* Fix nim v2 compilation error
* Addresing review
* Remove unnecessary custom serializer and let the library do the work
* fix error message
* Update readme.md
