Updated submodules to hide Examples folder

Additionally, updated Package manifest to allow importing of examples direct from UPM package.

.gitmodules

@@ -0,0 +1,4 @@
+[submodule "Examples~"]
+	path = Examples~
+	url = https://SimonDarksideJ@bitbucket.org/UnityUIExtensions/unity-ui-extensions.git
+	branch = Examples

Examples~

@@ -0,0 +1 @@
+Subproject commit a8ce2ee705be43c98db82e8307b5b4bf4801387e

package.json

@@ -1,7 +1,7 @@
 {
   "name": "com.unity.uiextensions",
   "displayName": "Unity UI Extensions",
-  "version": "2.2.2",
+  "version": "2.2.3",
   "description": "An extension project for the Unity3D UI system, all crafted and contributed by the awesome Unity community",
   "author": "Simon darkside Jackson <@SimonDarksideJ>",
   "contributors": [{
@@ -21,6 +21,13 @@
   "Unity",
   "Unity UI",
   "UI Extensions"
+],
+  "samples": [
+    {
+      "displayName": "UI Extensions Samples",
+      "description": "Examples and demonstrations of the Unity UI Extensions controls",
+      "path": "Examples~"
+    }
 ], 
   "license": "BSD3"
 }