[giac] fix classcast for Java<->JavaScript

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26015 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
4.9.148.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26016 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Attempt to add support for Linux portable


git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26017 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] add regroup() to all Limit commands so that exp(1)^2 -> exp(2) #3384

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26018 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e