RT.

The latest commit "f4687993c53a5339e" added "pdf" file type into inline image rules. This caused org-toggle-inline-image try to convert large PDF into png images. Caused very long time suspend.

[stardiviner]           <Hack this world!>      GPG key ID: 47C32433
IRC(freeenode): stardiviner                     Twitter:  @numbchild
Key fingerprint = 9BAA 92BC CDDD B9EF 3B36  CB99 B8C4 B8E5 47C3 2433
Blog: http://stardiviner.github.io/