Merge pull request #21 from thewtex/readme

DOC: Add README content

Author: jbvimort

README.rst

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+ITKTextureFeatures
+==================
+
+.. image:: https://circleci.com/gh/InsightSoftwareConsortium/ITKTextureFeatures.svg?style=shield
+    :target: https://circleci.com/gh/InsightSoftwareConsortium/ITKTextureFeatures
+
+.. image:: https://travis-ci.org/InsightSoftwareConsortium/ITKTextureFeatures.svg?branch=master
+    :target: https://travis-ci.org/InsightSoftwareConsortium/ITKTextureFeatures
+
+.. image:: https://img.shields.io/appveyor/ci/jbvimort/itktexturefeatures.svg
+    :target: https://ci.appveyor.com/project/jbvimort/itktexturefeatures
+
+
+Overview
+--------
+
+This repository contains `ITK <https://itk.org>`_ filters to estimate
+texture feature maps from N-dimensional images.
+
+For more information, see the `Insight Journal article <http://hdl.handle.net/10380/3574>`_::
+
+  Vimort J., McCormick M., Budin F., Paniagua B.
+  Computing Textural Feature Maps for N-Dimensional images
+  McCormick M.
+  The Insight Journal. January-December. 2017.
+  http://hdl.handle.net/10380/3574
+  http://insight-journal.org/browse/publication/985
+
+Installation
+------------
+
+Python
+^^^^^^
+
+Binary `Python packages <https://pypi.python.org/pypi/itk-texturefeatures>`_
+are available for macOS, Linux, and Windows. They can be installed with::
+
+  python -m pip install --upgrade pip
+  python -m pip install itk-texturefeatures
+
+3D Slicer Extension
+^^^^^^^^^^^^^^^^^^^
+
+The module functionality is also available in the `3D Slicer
+<https://slicer.org>`_ desktop application. Install the *BoneTextureExtension*
+in the `3D Slicer extension manager
+<https://www.slicer.org/wiki/Documentation/Nightly/SlicerApplication/ExtensionsManager>`_.
+`Additional documentation
+<https://raw.githubusercontent.com/Kitware/BoneTextureExtension/master/Docs/BoneTextureExtensionTutorial_2017.pdf>`_
+is available for `the extension
+<https://github.com/Kitware/BoneTextureExtension>`_.
+
+C++
+^^^
+
+Since ITK 4.13.0, this module is available in the ITK source tree as a Remote
+module. To enable it, set::
+
+  Module_TextureFeatures:BOOL=ON
+
+in ITK's CMake build configuration.
+
+License
+-------
+
+The source code is distributed under the Apache 2.0 License. Please see LICENSE file for details.
+
+Acknowledgements
+----------------
+
+This work was supported by the National Institute of Health (NIH) National
+Institute for Dental and Craniofacial Research (NIDCR) grant R21DE025306
+(Textural Biomarkers of Arthritis for the Subchondral Bone in the
+Temporomandibular Joint) and NIDCR grant R01DE024450 (Quantification of 3D
+bony Changes in Temporomandibular Joint Osteoarthritis).