added velvet

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
Merge branch 'master' of https://github.com/fgeorgatos/easybuild.experimental
Merge branch 'master' of https://github.com/fgeorgatos/easybuild.experimental
Merge branch 'master' of https://github.com/fgeorgatos/easybuild.experimental
cleanup goolf-1.4.10 easyconfigs

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
cleanup octave* easyconfigs

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>