Rename non-generated Manager, Node and Configuration structs

This release changes the names of the non-generated Manager, Node and Configuration structs to RawManager, RawNode, and RawConfiguration in order to better differentiate them from the generated versions.

This release also adds a generated ConfigurationFromRaw function that can be used to create a configuration from an existing RawConfiguration.

Fixes minor issues found by Go Report Card

This release mainly fixes some lint issues found by Go Report Card.

• Issues were mainly missing comments for public variables and functions
• In addition, this also reduces some complexity in the different call types and the benchmarking tool

Add custom ServerCtx with Release() method

Simplifies the server API by moving the release() function into a special context object ServerCtx.

Avoid reusing mutex for multiple streams.

Fixed Correctable streams.

incompatible changes

requestHandler: changed from func(context.Context, *Message, chan<- *Message) to func(ServerCtx, *Message, chan<- *Message)

compatible changes

(*Node).Host: added
SendMessage: added
ServerCtx: added

Refactor Node and other simplifications

This release is mainly refactoring and renaming some types.
Node now uses a new channel abstraction in place of the orderedNodeStream, and does away with receiveQueue and makes other simplifications.
Also Node decouples better from channel, making it easier to test both individually.
The channel abstraction may be expanded in the future to allow multiple channels per node.

Revised NewConfiguration API and more

This release includes a revised API for creating new configurations via Manager.NewConfiguration() that allows QuorumSpec and NodeListOption types be added in any order. The release also allows to create a configuration with additional nodes via Configuration.WithNewNodes and excluded via Configuration.Without, and there is also Configuration.And and Configuration.Except that operates on Configuration objects.

Other changes:

• Replaced deprecated golang.org/x/tools/go/loader with golang.org/x/tools/go/packages in gorums_bundle.go for a significant speed boost.
• Fixed bug in dependency handling due to missing generated files.
• Improved version handling.
• Upgraded all dependencies to the most recent version and tested.
• Documentation and user guides have been updated

Major overhaul of Manager vs Configuration API and much more

This pre-release is a major overhaul the Manager vs Configuration API; the WithNodeList, WithNodeMap and WithNodeIDs have been moved out of Manager and now is passed to Configuration at creation time. Further, what needs to be generated has been reduced even further, moving more logic to the top-level gorums package. Also, less info needs to be passed to the various call types (Call Data). Further, the documentation has been updated. The unused gorums.ordered option has been removed. Fixes an with PerNodeArgFunc and adds proper tests for this. And much more. See the commit messages and PR descriptions for additional details.

Pre-merge rewrite of generator architecture

This pre-release is just to put a stick in the ground for the current state of the codebase pre merging the new generator architecture that has significantly less generated code (and thus should have smaller binaries).

Bug fixes and more

See the commit logs for details...

First pre-release after rewrite to use v2 protobuf API

added benchmark for the receiveQueue

To run this benchmark:
go test -bench=BenchmarkReceiveQueue

Results on my machine are pretty conclusive:
BenchmarkReceiveQueue/RWMutexMap-12                 13286848                77.7 ns/op
BenchmarkReceiveQueue/syncMapStruct-12               2467936               482 ns/op
BenchmarkReceiveQueue/syncMapDirect-12               2494368               485 ns/op