Fixing optional textLabel property on cells

Xcode 6.1

Squashed commit of the following:

commit 6b6facc
Author: Mattt Thompson <[email protected]>
Date:   Fri Oct 10 05:30:58 2014 -0700

    [Issue Alamofire#164] Fixed mistake in merge

commit 8a814ee
Merge: 0930f42 29d8b97
Author: Mattt Thompson <[email protected]>
Date:   Thu Oct 9 16:01:55 2014 -0700

    Merge branch 'xcode-6.1' of github.com:Alamofire/Alamofire into xcode-6.1

    Conflicts:
    	Example/DetailViewController.swift
    	Example/MasterViewController.swift
    	Source/Alamofire.swift
    	Tests/ParameterEncodingTests.swift

commit 0930f42
Merge: b1882a1 7362404
Author: Mattt Thompson <[email protected]>
Date:   Thu Oct 9 15:58:36 2014 -0700

    Merge branch 'master' into xcode-6.1

    Conflicts:
    	Source/Alamofire.swift

commit 29d8b97
Merge: 80cc057 18f1d57
Author: Mattt Thompson <[email protected]>
Date:   Sun Oct 5 09:17:17 2014 -0700

    Merge pull request Alamofire#143 from nduplessis/xcode-6.1

    Xcode 6.1 GM fixes

commit 18f1d57
Author: Nico du Plessis <[email protected]>
Date:   Thu Oct 2 13:13:24 2014 +0200

    Xcode 6.1 GM fixes

commit 80cc057
Merge: 38e0783 f8bb0b4
Author: Mattt Thompson <[email protected]>
Date:   Tue Sep 30 09:35:22 2014 -0700

    Merge pull request Alamofire#139 from orta/xcode-6.1

    @mattt => update to support Xcode 6.1b3

commit f8bb0b4
Author: Orta Therox <[email protected]>
Date:   Tue Sep 30 17:17:27 2014 +0100

    update to support Xcode 6.1b3

commit b1882a1
Merge: 34ee306 bc6a58d
Author: Mattt Thompson <[email protected]>
Date:   Thu Sep 25 22:17:50 2014 -0700

    Merge branch 'master' into xcode-6.1

    Conflicts:
    	Source/Alamofire.swift
    	Tests/ParameterEncodingTests.swift

commit 38e0783
Merge: 34ee306 9933340
Author: Mattt Thompson <[email protected]>
Date:   Fri Sep 19 12:02:23 2014 -0700

    Merge pull request Alamofire#114 from rosskimes/xcode-6.1

    Compiles on Xcode 6.1 Beta 2.

commit 9933340
Author: Ross Kimes <[email protected]>
Date:   Fri Sep 19 13:17:02 2014 -0500

    Compiles on Xcode 6.1 Beta 2.

commit 34ee306
Merge: 67ee13a 6c087a9
Author: Mattt Thompson <[email protected]>
Date:   Thu Sep 18 07:49:27 2014 -0700

    Merge branch 'aral-patch-2' into xcode-6.1

commit 6c087a9
Merge: 2abe348 d49bbed
Author: Mattt Thompson <[email protected]>
Date:   Thu Sep 18 07:49:15 2014 -0700

    Merge branch 'patch-2' of github.com:aral/Alamofire into aral-patch-2

commit 67ee13a
Merge: 2abe348 ab4f4c0
Author: Mattt Thompson <[email protected]>
Date:   Thu Sep 18 07:48:31 2014 -0700

    Merge branch 'patch-1' of github.com:aral/Alamofire into aral-patch-1

    Conflicts:
    	Source/Alamofire.swift

commit d49bbed
Author: Aral Balkan <[email protected]>
Date:   Wed Sep 17 00:33:10 2014 +0100

    Replaced toRaw with rawValue (Xcode 6.1 Beta 2 update)

commit ab4f4c0
Author: Aral Balkan <[email protected]>
Date:   Wed Sep 17 00:31:15 2014 +0100

    Updated fromRaw and toRaw to rawValue

    Fixed for Xcode 6.1 Beta 2.

Make it easier to switch between the global request method and a manager

When you need to customize a header or timeout, this makes the delta
between your existing code and code using the manager smaller.

Minor refactoring