Fixes a few potential setObject:forKey: nil exceptions.
Version bump.
Missed this commit.
Recursively compute disk cache sizes
Fix error logging calls
Merge pull request #53 from vmartinelli/master

Importing Foundation, so TMCache can be used in Swift projects
Use NSURLTotalFileSizeKey
Merge pull request #54 from segiddins/recursive-size

Recursively compute disk cache sizes
Revert "Recursively compute disk cache sizes"
Merge pull request #55 from tumblr/revert-54-recursive-size

Revert "Recursively compute disk cache sizes"
Merge pull request #45 from tumblr/setObject-crashes

Fixes a few small setObject:forKey: exceptions that can be triggered