Valgrind FTW.

Valgrind FTW.

This bug was masked until commit
343d3e01

Partial revert of commit 8eedd4b7.

See bug #aevol-50.

Guillaume provided a new color map ranging from blue to red.

Unveil dark magic secret.

I forgot once again to check the tarball before publishing it to the
website. Mentioned it to the `RELEASE_HowTo` as a reminder.

`make` used to compile, but `make dist` dropped `IndivAnalysis.h`.
I tried to add the file to `aevol_misc_robustness_HEADERS` and
`aevol_misc_ancestor_robustness_HEADERS` but it lead to the following
error message that I didn't manage to troubleshoot:
`src/post_treatments/Makefile.am:63: error: 'aevol_misc_robustness_HEADERS' is used but 'aevol_misc_robustnessdir' is undefined`

Conflicts:
	src/post_treatments/Makefile.am
	src/post_treatments/fixed_mutations.cpp
	src/post_treatments/mutationalrobustness.cpp

This computation didn't belong to the core code