Remove fftw dependency when compiling libvips from src #57
Add details of Heroku buildpack, thanks @alex88 #57
Ensure xcode/clang uses cflags

Silence pedantic warnings triggered by V8 in 0.11
Use tile cache for interlace output

Doubles performance of Adam7 interlaced PNG output
Sends width and height as another parameter to the callback. Fixes issue #67
Merge pull request #68 from chanon/master

Pass additional info (width, height) to output callback
Small documentation improvement plus version bump
Merge branch 'master' into streams

Conflicts:
	README.md
	index.js