Examples missing for Render ViewHelper

[Alagts]

We should add some examples for the Render ViewHelper. At least the most often used properties should have an example. These are: partial, section, arguments and maybe also optional.

[froemken]

I love examples, but I don't get the structure here. Sure, I remember that we parse the fluid VHs comments for rendering, but this f:render VH has no examples in DocHeader. The real examples are in f:render of the TYPO3Fluid/fluid package. I have no clue how to extract them from there. Maybe we should import all examples into the TYPO3/Fluid f:render VH?!?!