Changing giac.js to the latest version in web/kickstart.xml

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25301 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Added GeoGebra Logo with name and transparent "o"

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25302 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Use the text size heuristic also for label hit zones

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25303 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e