removed the repeated gui paragraph

Author: mtezzele

README.md

@@ -16,11 +16,14 @@ See the **Examples** section below to have an idea of the potential of this pack
 
 
 ## Graphic Unit Interface
-**PyGeM** is now provided with a very basic Graphic Unit Interface (GUI) that, in Ubuntu environment, looks like the one depicted below. This feature can be easily used even by the pythonists beginners with not much effort.
+**PyGeM** is now provided with a very basic Graphic Unit Interface (GUI) that, in Ubuntu environment, looks like the one depicted below. This feature can be easily used even by the pythonists beginners with not much effort. Up to now, PyGeM GUI works on linux and Mac OS X computers.
 
-![PyGeM gui](readme/gui_PyGeM.png)
+Pick the geometry, the parameters file, set the name of the output and decide whether dump the FFD lattice or not. Now just click on the `Run PyGeM` button and that is it.
 
-Up to now, PyGeM GUI works on linux and Mac OS X computers.
+<p align="center">
+<img src="readme/gui_PyGeM.png" alt>
+<em>PyGeM GUI: how it appears when it pops up.</em>
+</p>
 
 
 ## Dependencies and installation
@@ -65,19 +68,6 @@ To uninstall the package you have to rerun the installation and record the insta
 The generated html can be found in `docs/build/html`. Open up the `index.html` you find there to browse.
 
 
-## Gui
-**PyGeM** comes with a very basic Graphic Unit Interface. 
-
-Pick the geometry, the parameters file, set the name of the output and decide whether dump the FFD lattice or not.
-Now just click on the `Run PyGeM` button and that is it.
-
-<p align="center">
-<img src="readme/gui_PyGeM.png" alt>
-</p>
-<p align="center">
-<em>PyGeM GUI: how it appears when it pops up.</em>
-</p>
-
 ## Testing
 We are using Travis CI for continuous intergration testing. You can check out the current status [here](https://travis-ci.org/mathLab/PyGeM).