[giac] use x/y instead of ggbtmpvarx/y in desolve.cc

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26364 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3299 continued, localstorage implementation for Web and Touch

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26365 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@26366 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e