Update README.md

README.md

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 [![Build Status](https://travis-ci.org/COMBINE-lab/salmon.svg?branch=master)](https://travis-ci.org/COMBINE-lab/salmon)
-[![Documentation Status](https://readthedocs.org/projects/sailfish/badge/?version=develop)](https://readthedocs.org/projects/sailfish/?badge=develop)
+[![Documentation Status](https://readthedocs.org/projects/salmon/badge/?version=latest)](https://readthedocs.org/projects/salmon/?badge=latest)
+
+What is Salmon?
+===============
+
+Salmon is a **wicked**-fast program to produce a highly-accurate, transcript-level quantification estimates from 
+RNA-seq data.  Salmon achieves is accuracy and speed via a number of different innovations, including the 
+use of *lightweight* alignments (accurate but fast-to-compute proxies for traditional read alignments) and 
+massively-parallel stochastic collapsed variational inference.  The result is a versatile tool that fits nicely
+into many differnt pipelines.  For example, you can choose to make use of our *lightweight* alignments by providing Salmon with raw sequencing reads, or, if it is more convenient, you can provide Salmon with regular alignments (e.g. 
+computed with your favorite aligner), and it will use the same **wicked**-fast, state-of-the-art inference algorithm 
+to estimate transcript-level abundances for your experiment.
+
+Documentation
+==============
+
+The documentation for Salmon is available on [ReadTheDocs](http://readthedocs.org), check it out [here](http://salmon.readthedocs.org).
 
 Chat live about Salmon
 ======================
 
 You can chat with the Salmon developers and other users via Gitter!
 
 [![Join the chat at https://gitter.im/COMBINE-lab/salmon](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/COMBINE-lab/salmon?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-
-
-Documentation
-==============
-
-The documentation for Salmon is available on [ReadTheDocs](http://readthedocs.org), check it out [here](http://sailfish.readthedocs.org).