Touch warnings fixed (imports + undid Java 1.7 setting for generics)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25770 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] make sure List/VectorValue +/- NumberValue works

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25771 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e