update main documentation

doc/index.rst

@@ -1,24 +1,19 @@
 .. microstruktur documentation master file, created by sphinx-quickstart on Tue Apr 14 10:29:06 2015. You can adapt this file completely to your liking, but it should at least contain the root `toctree` directive.
 
-Welcome to microstruktur's documentation!
+Welcome to dmipy's documentation!
 ====================================
 
-`Microstruktur` is a template for a small scientific Python project. 
+The dmipy software package facilitates state-of-the-art diffusion MRI Microstructure Imaging using a "Building Block" philosophy. In this philosophy, any combination of biophysical models, typically representing intra- and/or extra-axonal tissue compartments, can be easy combined into a multi-compartment Microstructure Model in just a few lines of code.
 
 To see how to use it, please refer to the `README file 
-<https://github.com/uwescience/microstruktur/blob/master/README.md>`_ in the Github repository.
-
-This is an example of documentation of the software, using sphinx_. 
-
-.. _sphinx: http://sphinx-doc.org/
+<https://github.com/AthenaEPI/dmipy/blob/master/README.md>`_ in the Github repository.
 
 
 Contents:
 
 .. toctree::
    :maxdepth: 2
 
-   theory
    auto_examples/index
    reference/index