CLN: make license file machine readable (#56)

Splits extra information about the license and copyright holders to
AUTHORS.md. Uses plain text license so that string matching of the
license file works better.

Fixes GH#30.

Author: tswast

AUTHORS.md

@@ -0,0 +1,57 @@
+About the Copyright Holders
+===========================
+
+*   Copyright (c) 2008-2011 AQR Capital Management, LLC
+
+    AQR Capital Management began pandas development in 2008. Development was
+    led by Wes McKinney. AQR released the source under this license in 2009.
+*   Copyright (c) 2011-2012, Lambda Foundry, Inc.
+
+    Wes is now an employee of Lambda Foundry, and remains the pandas project
+    lead.
+*   Copyright (c) 2011-2012, PyData Development Team
+
+    The PyData Development Team is the collection of developers of the PyData
+    project. This includes all of the PyData sub-projects, including pandas. The
+    core team that coordinates development on GitHub can be found here:
+    http://github.com/pydata.
+
+Full credits for pandas contributors can be found in the documentation.
+
+Our Copyright Policy
+====================
+
+PyData uses a shared copyright model. Each contributor maintains copyright
+over their contributions to PyData. However, it is important to note that
+these contributions are typically only changes to the repositories. Thus,
+the PyData source code, in its entirety, is not the copyright of any single
+person or institution. Instead, it is the collective copyright of the
+entire PyData Development Team. If individual contributors want to maintain
+a record of what changes/contributions they have specific copyright on,
+they should indicate their copyright in the commit message of the change
+when they commit the change to one of the PyData repositories.
+
+With this in mind, the following banner should be used in any source code
+file to indicate the copyright and license terms:
+
+```
+#-----------------------------------------------------------------------------
+# Copyright (c) 2012, PyData Development Team
+# All rights reserved.
+#
+# Distributed under the terms of the BSD Simplified License.
+#
+# The full license is in the LICENSE file, distributed with this software.
+#-----------------------------------------------------------------------------
+```
+
+Other licenses can be found in the LICENSES directory.
+
+License
+=======
+
+pandas is distributed under a 3-clause ("Simplified" or "New") BSD
+license. Parts of NumPy, SciPy, numpydoc, bottleneck, which all have
+BSD-compatible licenses, are included. Their licenses follow the pandas
+license.
+

LICENSE.md

@@ -0,0 +1,29 @@
+BSD 3-Clause License
+
+Copyright (c) 2008-2012, AQR Capital Management, LLC, Lambda Foundry, Inc. and PyData Development Team
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* Neither the name of the copyright holder nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.