Further work on DataManager.
Merge remote-tracking branch 'origin/vault' into data_manager

Conflicts:
	cmake/data_manager.message_types.meta
Merge remote-tracking branch 'origin/vault' into data_manager
Merge remote-tracking branch 'origin/vault' into data_manager
Further updates.
Minor fixes.
Merge remote-tracking branch 'origin/vault' into data_manager

Conflicts:
	src/maidsafe/vault/data_manager/dispatcher.cc
	src/maidsafe/vault/data_manager/dispatcher.h
	src/maidsafe/vault/data_manager/service.h
	src/maidsafe/vault/operation_handlers.h
Converted some linker errors to compiler errors.
Merge remote-tracking branch 'origin/vault' into data_manager
commented out bits to compile (need to implement missing HandleMessage() for some message types)
Merge branch 'vault' of github.com:maidsafe/MaidSafe-Vault into vault