[SAGA-RG] Saga Python bindings LSU-VU diff

Hi all, first, sorry for the delay but I was extremely busy with classes the last weeks. Please find attached the first attempt of a diff between LSU (1.4) and VU bindings. Please note that the VU bindings are a little bit outdated, as we just removed the buffer module from the spec but didn't have time yet to do the same for our LSU bindings wrapper. Furthermore I couldn't find the 'stream' and 'rpc' module in the LSU bindings. This is the first attempt to craft a somewhat clear layout to compare the two. I wrote a small script to build it, so I can tweak it relatively easily to change structure (in case somebody has a suggestion for better layout). Best, -- /Manuel