Minor changes after commits r492-497:
- Simplified the code change from r492. Also fixing minor bug; str_replace() on legend text had to be applied to both additions to the help text.
- Updated the error message added in r494, to emphasize the possible solution to the problem.
- Re-added accidentially removed code in r497.
- Added Daan to the headers of the files he was working on, and updated some forgotten modification dates.


git-svn-id: https://humgenprojects.lumc.nl/svn/LOVD3/trunk@498 a7477d18-a37e-46de-aef1-57953c184492