Update README.md

README.md

 # RBA plant cell model
 
 ## Description
-This project contains the RBA leaf cell model, that are encoded in the XML format compatible with the software RBApy.
+This project contains 
+- RBA-xml files: the RBA leaf cell model of A. thaliana that is encoded in the XML format compatible with the software RBApy.
 For further information on RBA or RBApy, please visit https://rba.inrae.fr/.
 Be careful: at this stage, RBApy is not able to support simulation for eukaryotic cells (Goelzer et al. BioRXiv 2019; 750182).
+- RBA_codes: the Matlab simulation codes for the RBA leaf model (Requires Matlab 2018 and Cplex 12.8).
+- Farquhar_arabette: the Farqhuar model and simulations for A. thaliana
 
 ## Installation
-Clone the repository. No further installation is needed.
+Clone the repository. 
+Install Cplex 12.6 or Cplex 12.8 if you want to run the model in Matlab. 
+Make sure that Cplex can be accessed by Matlab
 
 
 ## Authors and acknowledgment
-The RBA leaf cell model, the simulation code and the Farquhar model of Arabidopsis thaliana are developed by Anne Goelzer.
+The RBA leaf cell model, the RBA simulation code and the Farquhar model of Arabidopsis thaliana are developed by Anne Goelzer.
 
 ## License
 This project is under the licence CC-BY-NC