Add README.md file

Author: nickvergessen

README.md

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+# phpBB 3.1 Extension - Move Message
+
+## Installation
+
+Clone into phpBB/ext/phpbbde/movemessage:
+
+    git clone https://github.com/phpbb-de/phpbb-ext-movemessage.git phpBB/ext/phpbbde/movemessage
+
+Go to "ACP" > "Customise" > "Extensions" and enable the "phpBB.de - Move Message" extension.
+
+## Tests and Continuous Integration
+
+We use Travis-CI as a continous integration server and phpunit for our unit testing. See more information on the [phpBB development wiki](https://wiki.phpbb.com/Unit_Tests).
+To run the tests locally, you need to install phpBB from its Git repository. Afterwards run the following command from the phpBB Git repository's root:
+
+Windows:
+
+    phpBB\vendor\bin\phpunit.bat -c phpBB\ext\phpbbde\movemessage\phpunit.xml.dist
+
+others:
+
+    phpBB/vendor/bin/phpunit -c phpBB/ext/phpbbde/movemessage/phpunit.xml.dist
+
+[![Build Status](https://travis-ci.org/phpbb-de/phpbb-ext-movemessage.svg?branch=develop-ascraeus)](https://travis-ci.org/phpbb-de/phpbb-ext-movemessage)
+
+## License
+
+[GPLv2](license.txt)