Adding SPM Support (dzenbot#447)

Better late than never! Adding SPM Support

Closes dzenbot#463
Closes dzenbot#462
Closes dzenbot#461
Closes dzenbot#445

Author: kunalverma25

.gitignore

@@ -13,4 +13,5 @@ xcuserdata
 profile
 *.moved-aside
 DerivedData
-.idea/
+.idea/
+/.swiftpm

Package.swift

@@ -0,0 +1,33 @@
+// swift-tools-version:5.0
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "DZNEmptyDataSet",
+    platforms: [
+        .iOS(.v8),
+        .tvOS(.v9)
+    ],
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "DZNEmptyDataSet",
+            targets: ["DZNEmptyDataSet"])
+    ],
+    dependencies: [
+        // Dependencies declare other packages that this package depends on.
+        // .package(url: /* package url */, from: "1.0.0"),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(
+            name: "DZNEmptyDataSet",
+            dependencies: [],
+            path: ".",
+            sources: ["Source"],
+            publicHeadersPath: "Source"
+        )
+    ]
+)

README.md

@@ -61,6 +61,15 @@ To integrate DZNEmptyDataSet into your Xcode project using Carthage, specify it
 github "dzenbot/DZNEmptyDataSet"
 ```
 
+To integrate DZNEmptyDataSet into your Xcode project using SPM, specify it in your `Package.swift`:
+
+```ruby
+.package(
+    url: "https://github.com/dzenbot/DZNEmptyDataSet",
+    .branch("master")
+)
+```
+For existing, go to "File Navigator" -> "Select Project" -> "Project Name" -> "Swift Packages" -> "+" -> Paste "https://github.com/dzenbot/DZNEmptyDataSet" and proceed to select your target.
 
 ## How to use
 For complete documentation, [visit CocoaPods' auto-generated doc](http://cocoadocs.org/docsets/DZNEmptyDataSet/)