Tomcat 6 support

Vine Toolkit is prepared now to work with Tomcat 6 servlet container. To use the feature it is enough to set container type in the currently used installer to 'tomcat_6_x' value and have Tomcat 6 installed in the target path. The changes involved different components so it is required to update your Vine sources against the svn repository. Different installation types were checked and validated with success after changes:

- Liferay 5.2.3 + Tomcat 5
- Liferay 5.2.3 + Tomcat 6
- GridSphere 3.1 + Tomcat 5
- GridSphere 3.2 + Tomcat 5
- GridSphere 3.2 + Tomcat 6
- Servlet mode without portal framework under Tomcat 5
- Servlet mode without portal framework under Tomcat 6
- Standalone mode

With New Year Best Wishes,
VT Team