XWIKI-3171: Replace direct call to beanutil/convertutil with our own BeanManager component XWIKI-3213: Support creating wiki content based rendering macros
XWIKI-3171: Replace direct call to beanutil/convertutil with our own BeanManager component
XWIKI-3213: Support creating wiki content based rendering macros

* Implemented above feature (XWIKI-3213)

* Please note that this is a huge patch (my biggest commit I think). I might have done some mistakes so it could use some reviewing.



git-svn-id: 04343649e741710b2e0f622af6defd1ac33e5ca5@21967 f329d543-caf0-0310-9063-dda96c69346f

xwiki/xwiki-platform,xwiki/xwiki-platform,xwiki/xwiki-platform,pbondoer/xwiki-platform,pbondoer/xwiki-platform,pbondoer/xwiki-platform,pbondoer/xwiki-platform,pbondoer/xwiki-platform,xwiki/xwiki-platform,xwiki/xwiki-platform