Noissue - Add README [buildtools]

README.md

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+# Buildtools
+
+## Introduction
+
+Tools used to produce builds and releases of the Adblock Plus browser
+extensions. Intended to be used as a dependency by the extension repositories,
+not directly.
+
+
+## Usage
+
+Please refer to the documentation of the extension repositories for usage
+instructions.
+
+
+## Tests
+
+As per the [Python Coding Style guide](https://adblockplus.org/en/coding-style#python)
+this repository can be linted and tested using [Tox](https://pypi.python.org/pypi/tox).
+
+First make sure you have tox installed:
+
+    sudo pip install tox
+
+Now you can lint and test the code by running the tox command:
+
+    tox
+
+(Tox will take care of installing the other dependencies such as flake8 and
+flake8-abp inside a virtualenv when running the tests.)