improve CSS namespace support

This change allows the evaluation of multiple namespaces in a CSS
StyleSheet. The namespaces still have to be hardcoded.

Change-Id: I38cd3928e7378b1d5f39e44d11a3d6c0d3139262
Signed-off-by: Carsten Hiesserich <carsten.hie@gmail.com>
5 files changed