Port objective-c tutorials to Swift

Author: Daniil Fedotov

swift/.DS_Store

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+tutorial?/Carthage/Build
+tutorial?/Carthage/Checkouts
+*xcuserdata*

swift/.gitignore

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+# Swift code for RabbitMQ tutorials
+
+Swift code examples for the [RabbitMQ tutorials](http://www.rabbitmq.com/getstarted.html).
+
+## Requirements
+
+To run this code you need
+[Carthage](https://github.com/Carthage/Carthage) to pull down dependencies,
+which include the
+[Objective-C client](https://github.com/rabbitmq/rabbitmq-objc-client) itself.
+
+If you have Homebrew installed, simply:
+
+```sh
+brew install carthage
+```
+
+You also need a running RabbitMQ server on localhost.
+
+## Installation
+
+Each tutorial has its own Xcode project. Before the projects can be run, you
+need to download and build their dependencies.
+
+For example, to install tutorial 1:
+
+```sh
+cd tutorial1
+carthage bootstrap --platform iOS
+```
+
+You should then be able to open [the project](tutorial1/tutorial1.xcodeproj) in Xcode and hit Run. Output is
+NSLogged.
+
+See [ViewController.swift](tutorial1/tutorial1/ViewController.swift) for the
+implementation (each tutorial has its own `ViewController.swift`).
+
+## Running the tutorials on master
+
+If you're QAing a change, or just want to run these tutorials on the master version of the client, follow these steps.
+
+### Edit `Cartfile`
+
+Change the version number to the word "master"
+
+### Clear Carthage cache and update
+
+`rm -rf ~/Library/Caches/org.carthage.CarthageKit && carthage update --platform iOS`
+
+### Rebuild the project in Xcode
+
+If there have been breaking changes, you might now need to make changes to the tutorial.

swift/README.md

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+#!/bin/bash
+
+set -ex
+
+rm -rf ~/Library/Caches/org.carthage.CarthageKit
+
+for tutdir in `ls | grep "tutorial[1-9]"`
+do
+    cd $tutdir
+    carthage update --platform iOS
+    cd ..
+done

swift/bump_dependencies.sh

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+github "rabbitmq/rabbitmq-objc-client" "v0.10.0"

swift/tutorial1/.DS_Store

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+github "robbiehanson/CocoaAsyncSocket" "7.5.0"
+github "jeffh/JKVValue" "v1.3.1"
+github "rabbitmq/rabbitmq-objc-client" "v0.10.0"