Major change to isis_emcee_hammer: the format of the output chain has

been changed to Array_Type, so as to allow the running and reading of
larger files (more walkers, more steps, more parameters).  This had
become an issue with some recent runs that I have performed.  Affected
plotting codes have been revamped (I think).  Some redundant mpi code
removed, and subroutines have been reordered in the file.  Some minor
typos here and there cleaned up.  Side benefit: spurious 0's are no
longer written to the output files.

Given the major changes, we're now calling this version 1.0.0.
Hopefully nothing is broken, but people may want to check.  Also note:
not all of these changes have been propagated to the mpi routines.
(They will still insert 0's into the output files, for instance.)