Equal: add spec

Addresses #12.
Contain: flatten failure messages

Failure messages for collections would span multiple lines, which did
not display correctly in Xcode.

Addresses #12.
BeTrue: add spec

Fixes issue #12.
Add Prediction; matchers extend Prediction
README: update screenshot
README: add plea for help
Remove unnecessary bridging header
Quick.h: remove Cocoa import
QuickSpec: add documentation
QuickSpec.h: fix documentation typos
Add more fully-featured OS X example

- Add "Scenester" app to Examples
- Add "willBefore()" and "willNotBefore()" to allow for
  custom timeouts on async expectations
README: update example dir, add note on willBefore
First pass to make subject optional
Added beNil matcher, stability problems when passing non-optionals
expect must be inside it closure, doh
Updated README for optionals
Additional tests for optionals with different matchers
Remove whitespace
Add Quick-iOS target, support iOS testing

@sharplet is a genius. An absolute genius.
README: update iOS installation instructions