[giac] auto-simplifying by wrapping Expressions in Evaluate[...]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24828 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] auto-simplifying by wrapping Expressions in Evaluate[...]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24829 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Use ggbOnInit for loading empty Touch app.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@24830 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e