The current implementation is the exact same code as normal FGMRES. This commit
only sets up the "framework" for the implementation of FCAGMRES, i.e., a test
and an include in the algorithms header file.
The current implementation is the exact same code as normal GMRES. This commit
only sets up the "framework" for the implementation of CAGMRES, i.e., a test and
an include in the algorithms header file.