[giac] new libjavagiac.jnilib, hopefully with correct path to libgmp.10.dylib (won't work in Eclipse...)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26449 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Refactoring dilate (uses Coords instead of GeoPoint)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26450 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
4.9.168.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26451 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Some null pointer checks for GuiManager

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26452 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e