new CAS command Laplace[] for Laplace Transform

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34827 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
split browseGUI to use code for phone-app

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@34828 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e