Adds license file and badges for Database subtree split

src/Database/LICENSE.txt

@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+CakePHP(tm) : The Rapid Development PHP Framework (http://cakephp.org)
+Copyright (c) 2005-2016, Cake Software Foundation, Inc. (http://cakefoundation.org)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission 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.

src/Database/README.md

@@ -1,3 +1,6 @@
+[![Total Downloads](https://img.shields.io/packagist/dt/cakephp/database.svg?style=flat-square)](https://packagist.org/packages/cakephp/database)
+[![License](https://img.shields.io/badge/license-MIT-blue.svg?style=flat-square)](LICENSE.txt)
+
 # A flexible and lightweight Database Library for PHP
 
 This library abstracts and provides help with most aspects of dealing with relational