Fixed packages installer (#784)

* fixed packages installer

updated string extensions bc if was super confusing and poorly written

* bumped project version to 0.2.7

* added repo source url to package info

* updated submodules

Editor/PackageInstaller.cs

@@ -184,7 +184,7 @@ private static string CopyAsset(this string rootPath, string sourceAssetPath, st
         {
             sourceAssetPath = sourceAssetPath.ToForwardSlashes();
             destinationPath = $"{destinationPath}{sourceAssetPath.Replace(Path.GetFullPath(rootPath), string.Empty)}".ToForwardSlashes();
-            destinationPath = Path.Combine(Directory.GetParent(Application.dataPath).FullName, destinationPath);
+            destinationPath = Path.Combine(Directory.GetParent(Application.dataPath).FullName, destinationPath).ToForwardSlashes();
 
             if (!File.Exists(destinationPath))
             {

Runtime/Extensions/StringExtensions.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) XRTK. All rights reserved.
 // Licensed under the MIT License. See LICENSE in the project root for license information.
 
 using System;
@@ -13,9 +13,9 @@ public static class StringExtensions
     {
         public const string WhiteSpace = " ";
 
-        public const string Backslash = "\\";
+        public const string ForwardSlash = "\\";
 
-        public const string ForwardSlash = "/";
+        public const string BackSlash = "/";
 
         /// <summary>
         /// Encodes the string to base 64 ASCII.
@@ -77,22 +77,22 @@ public static string ToProperCase(this string value)
         }
 
         /// <summary>
-        /// Replaces all back slashes in the string with forward slashes.
+        /// Replaces all forward slashes in the string with back slashes.
         /// </summary>
         /// <param name="value"></param>
         /// <returns></returns>
         public static string ToBackSlashes(this string value)
         {
-            return value.Replace(Backslash, ForwardSlash);
+            return value.Replace(ForwardSlash, BackSlash);
         }
 
         /// <summary>
-        /// Replaces all backslashes in the string with forward slashes.
+        /// Replaces all back slashes in the string with forward slashes.
         /// </summary>
         /// <param name="value"></param>
         public static string ToForwardSlashes(this string value)
         {
-            return value.Replace(ForwardSlash, Backslash);
+            return value.Replace(BackSlash, ForwardSlash);
         }
     }
 }

package.json

@@ -10,9 +10,13 @@
     "Mixed Reality",
     "DI"
   ],
-  "version": "0.2.6",
+  "version": "0.2.7",
   "unity": "2019.4",
   "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/XRTK/XRTK-Core.git"
+  },
   "author": "XRTK Team (https://github.com/XRTK)",
   "dependencies": {
     "com.unity.ugui": "1.0.0",