- Add Facebook SDK

- Add PNUser Login

Example/Pods/FBSDKShareKit/LICENSE

@@ -0,0 +1,17 @@
+Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
+
+You are hereby granted a non-exclusive, worldwide, royalty-free license to use,
+copy, modify, and distribute this software in source code or binary form for use
+in connection with the web services and APIs provided by Facebook.
+
+As with any software that integrates with the Facebook platform, your use of
+this software is subject to the Facebook Developer Principles and Policies
+[http://developers.facebook.com/policy/]. This copyright notice shall be
+included in all copies or substantial portions of the software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.