add missing ticket about changelog, add more descript for problem precision solves

git-svn-id: http://svn.osgeo.org/geos/branches/3.4@3917 5242fede-7e19-0410-aef8-94bd7d2200fb
strip off dev from minor version

git-svn-id: http://svn.osgeo.org/geos/branches/3.4@3920 5242fede-7e19-0410-aef8-94bd7d2200fb