Updated I/O ops to support configurable consistency level.

Added node mark for delete
Updated I/O ops to support configurable consistency level.

Added node mark for delete
Initial commit with node verification.  Need to collapse into buffer for round trip optimization.
Added validation with time UUIDTest and verified existing impl.  Needs to use new batch for filtering
Merge branch 'two-dot-o' of github.com:usergrid/usergrid into two-dot-o