fix memory leak in fftw.c

Hg-commit: 4df855ac7d6266d35acb789344605caa54f09bee

Commit all outstanding changes

Hg-commit: 4cb0924e5373c32721437655a64c7c8c0e8b7b82

add ndim_fftw,*dim_fftw to Mat_FFTW data structure

Hg-commit: 78c78d7161f5d155b61bd495d86a7ab40d15cb2c

bugfix of fftw interface for case dim>3, complex. Must use pdim of type ptrdiff_t*, not PetscInt*.
Contributed by Amlan.

Hg-commit: 4d20e24846312520cc0cd010575775a79983a311

add support for dim=1,3,4 ... for fftw interface in complex build - contributed by Amlan Barua

Hg-commit: 5334a3120b620645c2262e73d106d71452f72026

bugfix again for fftw interface

Hg-commit: 1508767af28eb582fce23828b3414eb3054b6702

bugfix for fftw interface.

Hg-commit: 5d50a34f2e7f87087722069be99a23246be28e6b

MatDuplicate_XXX() and MatGetVecs_XXX() now reference the previous objects PetscLayout instead of making a new one for the created objects

Hg-commit: 09acbe7f87158c1125044b0743c911c532c88a17

MatDestroy(): cleanup the MatPreallocated() hack, fix all matrix types

Hg-commit: 8b12afa1931080f94d5efc78eba78580324579e8

Use #include <header.h> instead of #include "header.h" when there is no intent to search the current directory for header.h

Hg-commit: bd7216e80cc035071a5136364ab9d04bf9f41a07

removed #define PETSCXXX_DLL from top of all source files

Hg-commit: b784aa18ddcf5337d4011d34f0fa008681695ac1