added resize image dialog
removed refereces to overscroll, using clipping rectangle instead
removed refereces to overscroll, using clipping rectangle instead
fixed segfault
updated png loading to support all formats (except interlaced, still working on that)
wasnt testing for valid image correctly
wasnt testing for valid image correctly
fixed possible segfault when attempting to preview corrupted files
added comments
changed a few method names to be a tad more descriptive/consistent
added comments related to jpeg dpi
using vector for buffers, removed some redundant code
added smart wrapper for C-style FILE pointers
added smart wrapper for C-style FILE pointers
png displays error message when trying to load interlaced image