PCBDDC: added a slot for local neumann matrix in sub_schurs (for future use of MUMPS)

solved a bug with external packages and 0 sized seq_ksp

PCBDDC: added a second sub_schurs structure to pcbddc data structure

Begin reorganization of SubSchurs code for code reuse for adaptive selection of constraints

PCBDDC; split computation of local solvers

PCIS: added reusability of PCISSetUp

PCBDDC: make sub_schurs a member of PC_BDDC data structure

PCBDDC: rewrite sub schurs setup

in the cheap version, interior problems are all the same.

PCBDDC: memory leak

fixed gamg coarse grid to be general

Merge branch 'barry/fix-damp-not-one-pcapplyrichardson'

Merged in mark/gamg-printbug (pull request #238)

fixed fp_trap in output

fixed fp_trap in output

removed override of coarse grid solver so iterative solver can be used

removed override of coarse grid solver so iterative solver can be used

fixed fp_trap in output

-ksp_richardson_scale was ignored when PCApplyRichardson() was used
Fix: turn off PCApplyRichardson() when scale is not 1 and print PetscInfo warning

Reported-by: Mark Adams <mfadams@lbl.gov>

Fixed

-ksp_richardson_scale was ignored when PCApplyRichardson() was used
Fix: turn off PCApplyRichardson() when scale is not 1 and print PetscInfo warning

Reported-by: Mark Adams <mfadams@lbl.gov>

Fixed missing carriage return in uses of PetscInfo() and missing ierr CHKERRQ() usage

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Remove XXXRegisterAll() from public interface

This means we are relying on packages to be well behaved, to set
themselves up properly. Passes testexamples in my builds (haven't tried
complex).

Remove XXXRegisterAllCalled from public interface.

All XXXRegisterAll() methods are now idempotent, so a boolean indicating
whether they can be called or not is no longer necessary.

Merge branch 'stefano_zampini/pcbddcgraph-improve'

PCBDDC: added support for detecting disconnected subdomains if no CSR info is used

this can be useful in face- or edge-based discretizaions like RT ot Nedelec elements

PCBDDC; is there are no vertices in the graph, n_subset should be set to zero in the sequantial case

PCBDDC: added support for sequential graph analysis

this would be useful when detecting disconnected subdomains when no csr info is used (neither from the matrix, nor from the user)

Merge branch 'maint'

Fix for docs

Reported-by: Michael Welland <mwelland@anl.gov>

Merge branch 'barry/remove-unneeded-paren-petscmalloc'

Conflicts:
src/mat/impls/baij/seq/baij.c

Merge branch 'maint'