Accommodating changes to NodeId.
Merge pull request #79 from Fraser999/MAID-537

Accommodating changes to NodeId.
Merge branch 'next' into account_transfer

Conflicts:
	src/maidsafe/vault/cache_handler/tests/service_test.cc
	src/maidsafe/vault/data_manager/tests/service_test.cc
	src/maidsafe/vault/pmid_manager/service.cc
	src/maidsafe/vault/pmid_manager/tests/service_test.cc
	src/maidsafe/vault/pmid_node/tests/service_test.cc
	src/maidsafe/vault/tests/group_db_test.cc
	src/maidsafe/vault/tests/sync_test.cc
updating account transfer inline with node id changes.