Support persistent storage for inbound and outbound message sequence numbers

[kpavlov]

It should be possible to persist inbound and outbound message sequence numbers for restoring session after disconnect. Add settings similar to QuickFix ResetOnLogon, ResetOnLogout, ResetOnDisconnect, RefreshOnLogon (see http://www.quickfixengine.org/quickfix/doc/html/configuration.html#Session).
Use persisted settings if FixSessionSettingsProvider.resetMsgSeqNum() == false.

[guidomedina]

About that, I'm planning to convert SessionRepository to a sort of an interface so that I can provide my own SessionRepository, the idea is to get the sessions from a distributed map say, using Riak or Redis or Hazelcast or any KV distributed solution (GRID like)

[kpavlov]

SessionRepository interface was introduced