Better platform support for RichFaces 4

Today the JARs for guava, cssparser, and sac are provided by JBoss 7, but have to be provided additionally in WEB-INF/lib of a web app.

The following changes make it easier to use RichFaces 4

• Load these 2 modules for a web app: "org.w3c.css.sac" and "net.sourceforge.cssparser"
• In modules/org/w3c/css/sac/main/module.xml add to <dependencies>:
  <module name="net.sourceforge.cssparser" />
• upgrade modules/com/google/guava/main from r06 to r08 which is used in RichFaces (the current guava version is r09)

If the Guava upgrade is not possible, please support at least cssparser and sac via the first two bullets.