Bug fix: memory leak in PCDestroy_GASM().

Bugfix: Call the correct hypre method

The wrong hypre method was called to set the BJ parameter for the Euclid preconditioner.

need to call KSPSetFromOptions() after KSPSetOperators() so that command line null space is attached to correct matrix
updated example output for null space not attached to KSP

PCBDDC: updated man pages

PCBDDC: solve compilation error in nightly builds

PCBDDC: fix for complexes from nightly builds

PCBDDC: remove holes in the set of ranks of new processors

PCBDDC: fill should be set to reuse after KSPSetFromOptions

PCBDDC: added option to aggregate the adjacency between subdomains on a subset of the active processes

non contiguos option removed from MatISGetSubassemblingPattern

PCBDDC: fix warnings from nightly cxx-complex builds

PCBDDC: minimize conversions between matrix formats

PCBDDC: Replaced old non-memory scalable implementation of PCBDDCSubsetNumbering

New implementation is memory scalable and more efficient

win32: compile fix

PCBDDC: wrong restriction on coarse processors (now fixed)

PCBDDC: fix for complex builds

PCBDDC: if not using vertices (if any are present), we cannot reuse the Schur solver

PCBDDC: previous block check is invalid when R nodes come from reuse_mumps

It can happen that R is like this
0 1 2 3 6 9 4 7 10 5 8 11
Using the previous code the latter IS would be defined as block

PCBDDC: previous block check is invalid when R nodes come from reuse_mumps

It can happen that R is like this
0 1 2 3 6 9 4 7 10 5 8 11
Using the previous code the latter IS would be defined as blocked (but it isn't)

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PCBDDC: it does not have any sense to require adaptivity just for edges.

less stringent hermitian test in sub_schurs code

Merge branch 'barry/improve-nullspace-handling'

Merge branch 'barry/propagate-pcsetup-failures'

PCBDDC: improve logic around symmetric and positive definite

removed KSPSetNullSpace() since mat already carries that information
and having two locations for it is confusing, unnecessary and prone to error
added MatSetTransposeNullSpace() for providing the nu

removed KSPSetNullSpace() since mat already carries that information
and having two locations for it is confusing, unnecessary and prone to error
added MatSetTransposeNullSpace() for providing the null space of the transpose of the matrix and added support in KSPSolve() to remove this null space from the right handside of the linear system thus making the system consistent.

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PCBDDC: print ccs if we are in 2D

PCBDDC: reuse matrices with MatGetSubMatrices

PCBDDC: add output for psi basis functions