Fix #54
Fix #54

Minor change to the docs - hopefully this is enough to clarify things
for Mac OS X users (I've had a brief read on the differences between
MacPorts and Homebrew - given Homebrew's reliance on system installed
stuff, and installation into default PATH locations I'm hoping I'm
correct in excluding it from the "extra instructions")

Also modified the recipe to pre-split the command line. This should fix
things for Windows users who commonly have spaces in the path to things
like VLC or mplayer...

ListFranz/picamera,rocky1001/picamera,waveform80/picamera,tfroehlich82/picamera