Repairer interface.
Added NopRepairer.
Change the interface somewhat.
Fix typo.
Change zfarm for new interface.
Call the readstrategy factory function early, too.

After all, that saves one function call per select.
Wow! :)
Adjust crdtsvc (with NopRepairer for now so that it compiles).
Lowercase coreReadStrategy.
Merge pull request #4 from u-c-l/repair

Add a repairer interfare.