Reformated readme to markdown
Added separate license file
Initialized buffer variables, this was a bug that caused undefined behaviour.
Changed type for png_inflate()'s data variable, due to missmatch in signedness. I just didn't understand why this was made in the first place, since the data var was explicitly typecasted to unsigned before any operation was made with it.
Merge pull request #6 from yosh-se/yosh-fuckups

Merge request for my branch