Add some little modifications to development information

* With the footer removed, the development information (if activated) were too intrusive into Tuleap.

Change-Id: Ic7f101c48461aeda1ee05f2c8e39aac2341f1cc0
Merge commit 'refs/changes/41/1741/3' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  Add some little modifications to development information

Change-Id: Iad62f84887b26c74c7aad1a3ee19992d59050b71
This is Tuleap 6.9.99.47

Change-Id: I0416fba791e202fd6edd4f54f787742c4e16295f