Fix for #3407

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26070 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] use threads for Windows, OSX

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26071 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] use %= rather than = so that Evaluate[{{2,3,2},{1,1,1},{0,-1,3}}*{{x},{y},{z}}={{3},{2},{7}}] works

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26072 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Better separation of HTML5 and WEB

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@26073 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e