Replaced some .isListValue, .isVectorValue by instanceof

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25936 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
revert javagiac64.dll to previous version (file missing)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25937 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] add regroup() to Derivative[]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25938 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e