Fixes #3735 - Change link to rudder-doc from /usr/share/rudder to /usr/share/rudder/html
Merge pull request #257 from fanf/bug_3718/technique_versions_not_ordered

Fixes #3718: order technique versions in directive management screen
Merge pull request #256 from nperron/ust_3692/int/3735_change_link_to_rudder-doc

Fixes #3735 - Change link to rudder-doc from /usr/share/rudder to /usr/s...
Fixes #3736: allows to choose technique version for directive creation