Small readme change.

README.md

@@ -1,8 +1,10 @@
 # RAVEN
-RAVEN software to simulate Genome Scale Metabolic models (GEMs) and includes alot of functionality for reconstruction of GEMs based on different kinds of omics data. 
+RAVEN (Reconstruction, Analysis and Visualization of Metabolic Networks) Toolbox is a software suite that allows for semi-automated reconstruction of genome-scale models. It makes use of published models and/or the KEGG database, coupled with extensive gap-filling and quality control features. The software suite also contains methods for visualizing simulation results and omics data, as well as a range of methods for performing simulations and analyzing the results. The software is a useful tool for system-wide data analysis in a metabolic context and for streamlined reconstruction of metabolic networks based on protein homology
+
+If you are using RAVEN in any scientific work, please cite: [R. Agren, et. al, “The RAVEN Toolbox and Its Use for Generating a Genome-scale Metabolic Model for Penicillium chrysogenum,” PLoS Comput. Biol., vol. 9, no. 3, p. e1002980, Mar. 2013.](http://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1002980).
 
 ## Installation
-RAVEN can be installed via cloning the Github repository as per below or by downloading and extracting one of the a zipped [releases](https://github.com/SysBioChalmers/RAVEN/releases).
+RAVEN can be installed via cloning the Github repository as per below or by downloading and extracting one of the a zipped [release](https://github.com/SysBioChalmers/RAVEN/releases). Please note that the releases do not always represent the most up to date version.
 
 ```bash
 git clone git@github.com:SysBioChalmers/RAVEN.git