Version 1.6.0

1. d1e7e22 Remove internal.CallOptions entirely, and use the context's timeout for API calls. by David Symonds · 11 years ago
2. 1c3fdc5 Convert tree from appengine.Context to context.Context. by David Symonds · 11 years ago
3. d510d6e Add canonical import comments for each package by Dave Day · 11 years ago
4. f0c3e0a Add image package. by David Symonds · 11 years ago