Expose libvips' op-cache max items #76
Add gravity support to crop #45
Add method for fast access to image metadata #32
Add usage example of metadata method
Ignore libmagick's inconsistent GIF colour spaces
Expose libvips interpolators #69
Small doc improvements ahead of v0.6.0
Merge branch 'master' of https://github.com/lovell/sharp

Conflicts:
	README.md
	tests/unit.js