oops, haskell uses gcc to link, correctly pass flags

since shared libs are now our friends, let's optimise them

aaaaand let's not forget about lua, which has also a slightly revised build process

drop the '_'

and now also avwrapper can be shared/static, add visibility to its exported functions, drop (needed only when static)

also physlayer can be comiled as static or shared now

redid FindGLEW in the right way (tm)