Made references to Copy namespace-explicit.  (Copy --> ::Copy.)
StokesCavityFlowDriver work, including condensed solve support.
Various StokesBackwardFacingStepDriver work, including choice-based command-line options.
NavierStokesCavityFlowDriver work, including getting rid of legacy I/O files.
Merge branch 'master' of github.com:CamelliaDPG/Camellia