[giac] make sure correct CAS reported in Help -> About

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24788 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] Attempt to make solve work with surd (nth-root)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24789 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] adding common functions to parser

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24790 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Changing giac.js to the latest version in web/kickstart.xml

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24791 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e