Swift 4

Updated codebase to Swift 4 - Thanks @jakubpetrik

Aliases & Tests

From the roadmap

Aliases
Thanks @stephenriolo

Better Test Coverage
Thanks @JeanAzzopardi @BernardGatt

Travis CI
Thanks @BernardGatt

Other Issues

Remove logQueue unwrap forcing
Thanks @phimage

Fixes issues with Xcode 8.3 and Swift 3.1
Thanks @BernardGatt