Merge pull request #12 from artnez/fix-aspect-ratio

Fix aspect ratio logic
Cleanup, Go vet/lint updates
Generate ETag header using the image digest
Merge pull request #14 from storehouse/govet-updates

Go vet/lint updates
Update changelog and version
Update Dockerfile base
Ability to change StatsD settings
Merge pull request #15 from storehouse/statsd-settings

Ability to change StatsD settings
Update Changelog
Merge pull request #16 from storehouse/etags

Generate ETag header
Update Changelog
Refactor image processor interfaces

- Replace NewImageFromHTTPResponse with NewImageFromBuffer
- Check for errors instead of nil image structs
- Image struct wrapper with helper methods
Add scale mode, refactor image processor
Update README and examples
Add aspect_crop. Change semantics of aspect_fill.
Update scale_mode in README, add cheat sheet
Merge pull request #17 from storehouse/crop-mode

Scale Mode
Add support for image orientation
Add documentation for auto_orient
Merge pull request #20 from storehouse/auto-orient

Auto-Orient