mlsdc: Begin add 'initial' flags.  Tidy various.

Signed-off-by: Matthew Emmett <memmett@gmail.com>
mlsdc: Don't interpolate delta of initial conditions.

Signed-off-by: Matthew Emmett <memmett@gmail.com>
encap: Put various classes into their own include files.

Signed-off-by: Matthew Emmett <memmett@gmail.com>
Merge pull request #8 from Parallel-in-Time/feature/tighten-mlsdc

Tighten up MLSDC: fewer function evals and other tidying.