Merge pull request #75 from alberts/master

Make tests compile again.
refactor(delete.go) rename deleteRaw to rawDelete; be consistent with other operations
Merge pull request #76 from xiangli-cmu/rawDelete

refactor(delete.go) rename deleteRaw to rawDelete
feat(compare_and_swap.go) add RawCompareAndSwap
Merge pull request #77 from xiangli-cmu/raw_CAS

feat(compare_and_swap.go) add RawCompareAndSwap
Log in case of network error.