added list of bugs to fix before 0.8

I added a lsit of the bugs that need fixing before we can (finally) relase the version 0.8 to the new wiki:
http://apps.sourceforge.net/mediawiki/travelingsales/index.php?title=Main_Page

The new relase will contain:
* An LODDataSet with 4 OsmBinDataSets as the new default-database, replacing the slow and unindexed plain-xml -storage of the FileTileDataSet.
* The ODRPaintVisitor as the new default-renderer