Moved from `temporary` to `tmp` to stop creation of excess tempfiles

Removed dev console.log

Switched from temporary to tmp and generating .png files

It looks like that .png name was either a legacy issue or OS specific =/

Removing dev console.log

Correcting logic once more

Fixing up tmpdir for node@0.8 tests

It turns out that the `.png` filename works with graphicsmagick

Adding assertions for temporary files

Attempting to use `.name` but no luck
Release 0.3.0