Merge index and welcome.rst.

docs/index.rst

@@ -1,9 +1,39 @@
-.. include:: welcome.rst
+=======
+Welcome
+=======
 
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+UnrealCV helps computer vision researchers build virtual worlds using Unreal Engine 4 (UE4). It extends UE4 with a plugin by providing:
+
+1. a set of UnrealCV commands to interact with the virtual world
+2. Communication between UE4 and an external program, such as Caffe or tensorflow.
+
+.. figure:: images/homepage_teaser.png
+    :align: center
+
+    Fig.1: Images generated from the technical demo :ref:`rr`
+
+Currently, UnrealCV plugin supports UE4 (4.12, 4.13, 4.14) in Windows, Linux and Mac, more details about supported platforms in :ref:`this page <supported>`. UnrealCV client supports python and MATLAB (experimental). Read :doc:`getting started <tutorials/getting_started>` to learn how to use UnrealCV.
+
+Tutorials are provided to help you get familiar with UnrealCV quickly and more technical details are documented in the reference section.
+
+Tutorials
+=========
+
+- :doc:`tutorials/getting_started` - The basics of using UnrealCV, start from here.
+- :doc:`tutorials/generate_images_tutorial` - Generate an image dataset with ground truth.
+- :doc:`tutorials/faster_rcnn` - Show how to use images from a video game for testing faster RCNN.
+- :doc:`plugin/install` - How to install UnrealCV plugin into UE4.
+
+Reference
+=========
+- :doc:`reference/architecture` - Technical details of UnrealCV.
+- :doc:`reference/commands` - All available commands provided in UnrealCV.
+
+For the doc of a specific version of unrealcv, please see `the version page`_
+
+.. _the version page: https://readthedocs.org/projects/unrealcv/versions/
+.. _readthedocs: http://docs.unrealcv.org
 
-    welcome
 
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