Deleting old files

Some old files were deleted. For the moment the inputs come directly in
the code, no file reading implemented
Revert "Deleting old files"

This reverts commit fe1a396041319e854ad9d37faa0d62d4a2605f15.
Revert "Revert "Deleting old files""

This reverts commit ec820eb65bb7947be9e2fa0edb0277dc4e3a8b25.
Revert "Revert "Revert "Deleting old files"""

This reverts commit 405b7cb5b8e49c647fc6dd7fa05170ed438f7d2a.
Cleaning the repo

result files deleted
Recreating Spectra

Spectrum creation modifications. Sign variations for k (in Shinozuka's
method) are now taken into account. Correlation length found is half of
expected (but converges) for the 1D case. Tests for the 2D and 3D case
still to be made.
Correlation Size Calculation Update

Factor 2 due to symmetry  added. Tests were made for 1D and 2D cases
(the latter with different correlation lengths in each dimension) and
good results were obtained for 100 discretization steps in time and
space (in each direction) and 1000 events (Monte-Carlo)
Makefile update
Input by file
Visualisation problems solved
HDF5 and XMF modified for Nmc > 1
Last version before MPI
First commit on develMPI branch
First MPI version
Partial version of MPI code (only for backup)
Running version restructured MPI code
Forgotten File
HDF5 problem solved