Csc-pysparse

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reimplemented SpMatrix_LLMatBuildColIndex and SpMatrix_LLMatDestroyColIndex

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new module itsolvers_util: encapsulation objects for all iterative solvers

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fixed bug in poisson.poisson2d_sym_blk(): diagonal entries are now 4, not 2.

changed superlu_superlu_timer.c to support Win32

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test module for superlu

poisson module for generating 1D and 2D Poisson matrices

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incorporated a new version of SuperLU (date 2002/09/23)

changed postorder tree traversal in sp_coletree.c to be more stack friendly
(max stack size on Linux seems to be 6 MBytes)

removed stdout in get_perm_c.c

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fixed bug in matvec method of csr_mat, occuring if stride of vector y is not one

ll_mat.shift now supports shift of a general matrix by a symmetric matrix

new matvec and matvec:transp object methods for ll_mat type

fixed bug when assigning a symmetric matrix to a block of a general matrix

delete_cols method added for ll_mat objects