Update to latest version of API spec

• Update specs to latest, fixes several crash issues

Better uploads/downloads

Update uploads/downloads

• For uploads, let caller supply upload data as either a stream,NSData, or from a file URL
• For downloads, let caller supply a download location using a closure
• Clean up request interface

Fix issues with keychain code

Fix substantial issues with keychain code
Improve access token interface

This release will effectively unlink all users from the app prior to this release as the keychain code is incompatible. We are still in pre-release mode here.

Update to latest version of API spec

• Fix some server-incompatible changes in a few API calls
• Change "reason" to "error"
• Add request-ids

Swift 2.0 and associated changes

• Merge swift 2.0 branch to master
• Update URL routing prefix from /2-beta-2 to /2/ as we move towards production-readiness.
• Update User-Agent
• Clean up code generation
• Minor library changes (public constructor for DropboxAccessToken)
• Replace assert with precondition and fatalError

dAuth and other fixes

• Add dAuth flow to Swift SDK
• Fix some serialization issues
• Accept 403 and 404 status codes with the same behavior as 409s
• Change assert to fatalError and precondition

Update to new serialization format

• Update to new serialization format for unions (breaking change from 0.1)
• Add serialization of "enumerated subtypes"
• Refactor DropboxClient out from the generic client
• Add Dropbox helper class for the typical single-user case that most apps will use.

Initial public beta

Initial public beta release of SwiftyDropbox