adding tests around key state
renaming table name methods
adding message envelope
adding token maintenance and hiToken
adding epoch increment veto
renaming leaderDepsMatch to leaderAttrsMatch
adding veto to token instance
adding veto support to try preaccept
adding skipExecution and some other stuff
laying groundwork for checking every epaxos message
wrapping preaccept request in message envelope
wrapping commit request in message envelope
making preaccept response and epoch message
renaming epaxos message to epoch message
making verb handler epoch verification part of an abstract class
adding epoch data to accept request
making commit verb handler epoch aware
making prepare verb handler epoch aware
stubbing out the failure recovery task
making the trypreaccept verb handler check epoch data