Remove unwraps in non-testing code
Initial support for interlaced images (still fails on some reference images)
Merge commit '71d3b0d29f8b14bfc885c861902a55a5f376f996'
remove tabs
Merge pull request #164 from nwin/master

Initial support for interlaced PNG images
Improve docs, mention possible panics.
Merge pull request #166 from nwin/master

Improve docs, mention possible panics.
Fixing palette interlaced images and palette pictures with width % 8 != 0
Use the correct widths when expanding the image.
Merge pull request #167 from nwin/master

Fixed palette interlaced images.
Update CHANGES.md
Merge branch 'master' of git://github.com/PistonDevelopers/image

Conflicts:
	src/image.rs