Redrew the penguin's eyes

Its gonna be hard to make these eyes render at small sizes. I redrew
this and exaggerated the sizes of the eyes and beak. I think its a
little more distinguishable, but it still needs work.
Process all source svgs through inkscape

The corrupt path defs in some of these were producing really ugly output
with my version of imagemagick. CLeaning up all of the source files
means that we can dispense with the inkscape dependency for build &
deploy... so it can work on macs.