Write hacky twitter client
Merge branch 'develop' into feature/twitter

Conflicts:
	examples/counter/main.go
Put credentials in external file
Add rate limiting to avoid being blocked by Twitter
Make dimensionChange work with subimages
Merge branch 'feature/twitter' into develop
Add SubImager
Add concurrency example
Merge branch 'feature/subimage' into develop
Make examples more idiomatic
Make dimensionChanger a SubImager, use it in resizing example