OpCompressedCache: Minor refactoring to make it easier for subclasses to use specific member functions.
Also, added a special fast-path to be used by the label array subclass when writing an all-zero block.
OpCompressedUserLabelArray: Refactored as a subclass of OpCompressedCache:
- Now explicitly aware that any data NOT in the cache is automatically zeros.
- Does not create new cache blocks during execute() ONLY during setInSlot().
Merge branch 'compressed-labels-rewrite'
submodules: Updated dvidclient.