Add cancelFetch to entity protocol
NSHTTPURLResponse extension
First go at NetworkEntity (without tests)
Add OHHTTPStubs as submodule
Fix bug in hnk_validateLengthOfData
First test using OHHTTPStubs
Test validateLengthOfData
Further NetworkEntity tests
Check if image is valid
Merge pull request #66 from Haneke/feature/entities/network

Network entity. Closes #45.
Fix import and add names to ScaleMode
Fix imports
[UIImageView hnk_format]
Return if fetch succeeded synchronously
Make Entity a @objc class protocol
[UIImageView hnk_setImageFromEntity]. Closes #53.
Use autoclosure in SimpleEntity
[UIImageView hnk_setImage]
hnk_setImage is unlikely to fail
Merge pull request #68 from Haneke/feature/uikit/image-format

UIImageView format. Closes #52.