- Update Guanaco, LlamaKit, Nimble, and Quick to versions that support
Swift 1.2.
- Update Xcode project and scheme files for "latest Xcode version"
parameters.
- Use Swift 1.2's new fallible casts for casts that may fail at runtime.
This is the first of a series of commits intended to resolve issue #10,
which calls for proper error handling.
One way to test that libgit2 error messages are being propagated through
Result failures is by asserting that the error's description or code
match the message or code we expect. In order to do so, LlamaKit's
ErrorType is unweildy, and not future-proof--it would be easier and
safer to write assertions based on NSError.
Upgrade LlamaKit to v0.5.0, the latest version that supports Swift 1.1,
in order to define results as type `Result<T, NSError>`.
