SERVER-15496 Code movement to facilitate ripping out legacy replication code
SERVER-15877 Give secondaries 1 second to catch up in replSetStepDown
SERVER-15614 Move inProcCmd to a separate file and clean includes

It is currently in instance.cpp, which is very cluttered. This change is
in preparation for the db.currentOp fix.
SERVER-15044 Remove negation of string from fassert call