Remove unused TestBlockVotingBlockMaker function
Readability improvments to comments for core/quorum/ and raft/
Readability improvments to raft/speculative_chain.go
Readability improvments to docs/
Fedora/RedHat distros comply with US patent law and remove this curve,
which makes it impossible to run ethereum with distro provided Golang.
File crypto/ecies/README claims it is unsupported anyway.