Add license & readme

Author: Seldaek

LICENSE

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+Copyright (c) 2011 Jordi Boggiano
+
+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.

README.mdown

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+JSON Lint
+=========
+
+[![Build Status](https://secure.travis-ci.org/Seldaek/jsonlint.png)](http://travis-ci.org/Seldaek/jsonlint)
+
+Usage
+-----
+
+    use Seld\JsonLint\JsonParser;
+
+    // returns null if it's valid json, or a ParsingException object. Call
+    // ->getDetails() on the exception to get more info.
+    $parser->lint($json);
+
+    // returns parsed json, like json_decode() does, but slower, throws
+    // exceptions on failure.
+    $parser->parse($json);
+
+Requirements
+------------
+
+- PHP 5.3+
+- [optional] PHPUnit 3.5+ to execute the test suite (phpunit --version)
+
+Submitting bugs and feature requests
+------------------------------------
+
+Bugs and feature request are tracked on [GitHub](https://github.com/Seldaek/jsonlint/issues)
+
+Author
+------
+
+Jordi Boggiano - <[email protected]> - <http://twitter.com/seldaek>
+
+License
+-------
+
+JSON Lint is licensed under the MIT License - see the LICENSE file for details
+
+Acknowledgements
+----------------
+
+This library is a port of the JavaScript [jsonlint](https://github.com/zaach/jsonlint) library.