ready for proper tag 4_2.

NB: former tags (3_10 and 4_1) were done on GUIprofs instead
of gdat by error... Now: includes tag_3_10, 4_1 and 4_2

in README file: change default to LIUQE.M and introduced
liuqe=1,2,3,11,12,13,21,22,23 or -1 as in GUIprofs and proffit and before mv to git

git-svn-id: https://spcsvn.epfl.ch/repos/TCV/gdat/trunk@12249 d63d8f72-b253-0410-a779-e742ad2e26cf