#3592 and some refactoring

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25721 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] Add implicit assumption for simple arguments of sqrt, to improve simplification. Tentative fox for fsolve (syst. of equations)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25722 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@25723 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Separate GWT modules for Html5 and Web: touch should not inherit Web's styles.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25724 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e