Add Unity Package Manager support (#165)

.gitignore

@@ -21,9 +21,6 @@
 sysinfo.txt
 
 /Examples/
-README.md.meta
-LICENSE.md.meta
-CONTRIBUTING.md.meta
 
 .git.meta
 .gitignore.meta

CONTRIBUTING.md.meta

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LICENSE.md.meta

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README.md

@@ -32,6 +32,16 @@ With a minimal footprint, it is ideal as a base for custom state machines, dialo
 * [Getting started](https://github.com/Siccity/xNode/wiki/Getting%20Started) - create your very first node node and graph
 * [Examples branch](https://github.com/Siccity/xNode/tree/examples) - look at other small projects
 
+### Installing with Unity Package Manager
+To install this project as a dependency using the Unity Package Manager,
+add the following line to your project's `manifest.json`:
+
+```
+"com.github.siccity.xnode": "git+https://github.com/siccity/xNode.git"
+```
+
+If you are using [Assembly Definitions](https://docs.unity3d.com/Manual/ScriptCompilationAssemblyDefinitionFiles.html) in your project, you will need to add `XNode` and/or `XNodeEditor` as Assembly Definition References.
+
 ### Node example:
 ```csharp
 // public classes deriving from Node are registered as nodes for use within a graph

README.md.meta

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Scripts/Editor/XNodeEditor.asmdef

@@ -0,0 +1,17 @@
+{
+    "name": "XNodeEditor",
+    "references": [
+        "XNode"
+    ],
+    "optionalUnityReferences": [],
+    "includePlatforms": [
+        "Editor"
+    ],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": true,
+    "defineConstraints": [],
+    "versionDefines": []
+}

Scripts/Editor/XNodeEditor.asmdef.meta

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Scripts/XNode.asmdef

@@ -0,0 +1,13 @@
+{
+    "name": "XNode",
+    "references": [],
+    "optionalUnityReferences": [],
+    "includePlatforms": [],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
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+    "versionDefines": []
+}

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package.json

@@ -0,0 +1,7 @@
+{
+  "name": "com.github.siccity.xnode",
+  "description": "xNode provides a set of APIs and an editor interface for creating and editing custom node graphs.",
+  "version": "1.7.0",
+  "unity": "2018.1",
+  "displayName": "xNode"
+}

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