Modify where we generate header files to enable in-place configuration and compilation in both spm and pastix

Replace MPI_COMPILE_FLAGS by MPI_C_COMPILE_FLAGS

See merge request !13

replace MPI_COMPILE_FLAGS by MPI_C_COMPILE_FLAGS that should be cleaned (without semicolons) after MPI find_package

Remove old sparskit file from spm to avoid conflicts with user's applications

Closes #2

See merge request !12

Feature/lascl

See merge request !11

Fix issue with Fortran interface

 * Fix some printing in the checkAxb for forward error
 * Add the spmf pkg-config file.
 * Update the cmake_module file to integrate the generice pkg-config
file and env.sh generation macros
 * Fix issue solverstack/pastix!29 with the fortran interface to avoid
mixing C Malloc/Free and Fortran Allocate/deallocate
 * `spmCheckAndCorrect` interface has been modified
 * Fix warnings about enum types with intel compilers.

See merge request !10

Hotfix/sonarqube

See merge request !9

Feature/matvec 4all

See merge request !4

Switch to a double for matVec/MatMat generic function to avoid troubles with Fortran/Python interfaces