INT-3204 RemoteFileTemplate Phase II Part 1

- AbstractInboundFileSynchronizer

INT-3204 RemoteFileTemplate Phase II, Part 2

- AbstractRemoteFileOutboundGateway
- Encapsulate Session.readRaw and .finalizeRaw in template.get()

INT-3204 Polishing - PR Comments

JIRA: https://jira.springsource.org/browse/INT-3204

INT-3204: Polishing