implement gc-enumeration functions. i thought i could just use aravis' string functions to set the different pixel formats but this is not working. i will have to inquire possible format strings and their integer numbers and convert strings to integers myself
i was freeing the strings that available-string-values returned. i must only free the pointers!
set-pixel-format works with strings
image acquisition works now, clean up
having problems with vector size limitation when processing Mono12Packed