Added support for methods in EL

Hi,
I found this perfect library, but I could not use it in my project, because tables I am using, contain method calls in EL. So far, table can consist only of simple properties.
Please have a look at file _dataTableNonLazy.xhtml_ line 83 to see what I mean.
With this pull request, method calls will be supported just fine.

btw. not sure why github detects so many code changes... I guess I accidentaly changed EOLs... Anyway, the main change happened in class _ValueHolderFormatter_ + I changed a few test xhtmls.