Properly record missing named primitives
Rename some VM attributes
Ignore double-slashes in file paths
BitBlt: implement rule 20 (rgbAdd)
handle native float-order (Cog images)
Write correct image magic number
Answer some vmParameters
demo: alert user about errors
release 0.3.0

runs Squeak 4.5 image now
demo: log error to console
bitblt: mode 40 (fixAlpha)
bitblt: fail rule 41 (Freetype subpixel rendering)
Merge pull request #11 from timfel/master

Add benchmark image, pull out utility function to convert bytes into string
Pretend to defer display updates
Factor out contextSizeWithStack
Rename breakOnReturn to breakOnReturnFromThisContext
More image hacks (commented out)
Switch primitive based on image version
Add stackBoolean
Implement deferred display updates