[giac} Further changes for nacl, e.g. to make time() work

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31738 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Content MathML parser (Apache 2.0)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31739 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@31740 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Undo-redo won't remove the listeners. (#4077)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31741 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
compile error

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31742 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
#3871 pNaCl Cas integrated into GeoGebra, but works only from the console for now.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@31743 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e