Minor updates to SureFile.
Merge branch 'next' of github.com:maidsafe/MaidSafe into next

Conflicts:
	examples/surefile/include/maidsafe/surefile/surefile.h
	examples/surefile/src/maidsafe/surefile/surefile.cc
Merge remote-tracking branch 'origin/next' into api_changes
Changes to match updated Drive API (WIP).