Add CHANGELOG.md, CONTRIBUTING.md and LICENSE

Author: tomphp

CHANGELOG.md

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+# Changelog
+
+### 0.0.1 (2016-01-10)
+
+  * Added: `Filter::isNull()`
+  * Added: `Filter::notNull()`
+  * Added: `Filter::isSameAs($expected)`
+  * Added: `Filter::notSameAs($expected)`
+  * Added: `Filter::isLike($expected)`
+  * Added: `Filter::notLike($expected)`
+  * Added: `Filter::hasMethodReturning(string $methodName, $expected, bool $strict = true)`
+  * Added: `Filter::notHasMethodReturning(string $methodName, $expected, bool strict = true)`
+  * Added: `Transform::callMethod(string $methodName)`
+  * Added: `Transform::getEntry(string|string[] $name)`
+  * Added: `Transform::argumentTo(callable $callable)`

CONTRIBUTING.md

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+# Contributing
+
+Thank you for considering to contribute to this project.
+
+## Tests
+
+All new features or bug fixes should include supporting tests. To run the test
+suite you need to first install the dependencies using composer:
+
+```
+$ composer install
+```
+
+Then the tests can be run using the following command:
+
+```
+$ phpunit
+```
+
+This will also check for the PSR-2 Coding Standard compliance.
+
+## Travis
+
+Once you have submitted a pull request, Travis CI will automatically run the
+tests. The tests **must** pass for the PR to be accepted.
+
+## Coding Standard
+
+Please stick PSR-1 and PSR-2 standards - this will be verified by Travis CI:
+
+* https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-1-basic-coding-standard.md
+* https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md
+
+Also, keep the code tidy and well refactored - don't let methods get too long
+or there be too many levels of indentation.
+
+Happy coding and thank you for contributing.

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2013 Tom Oram
+
+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.