NSFileManager category for enumerateContentsOfDirectoryAtPath
Helper class for tests that require disk files
First go at NSFileManager+Haneke tests
First go at controlling capacity
Further NSFileManager+Haneke tests
Add link to StackOverflow
Further control capacity on init tests
Control capacity when setting data
Control capacity on setter
Merge pull request #25 from hpique/feature/disk-cache/control-capacity

Control disk cache capacity. Closes #12.