Fixes kamranahmedse#9 - Update contribution guide

README.md

@@ -2,7 +2,7 @@
 
 > Roadmap to becoming a web developer in 2017
 
-Below you find a set of charts demonstrating the paths that you can take and the technologies that you would want to adopt in order to become a frontend, backend or a devops guy. I made these charts for an old professor of mine who wanted something to share with his college students to give them a perspective.
+Below you find a set of charts demonstrating the paths that you can take and the technologies that you would want to adopt in order to become a frontend, backend or a devops. I made these charts for an old professor of mine who wanted something to share with his college students to give them a perspective.
 
 If you think that these can be improved in anyway, please do suggest.
 
@@ -39,7 +39,7 @@ If you think any of the roadmaps can be improved, please do open a PR with any u
 
 ## 👬 Contribution
 
-The roadmaps are built using [Balsamiq](https://balsamiq.com/products/mockups/). Project file can be found at `/ROADMAPS.bmpr`, open it in balsamiq, do the necessary modifications and create a PR.
+The roadmaps are built using [Balsamiq](https://balsamiq.com/products/mockups/). Project file can be found at `/ROADMAPS.bmpr`, open it in balsamiq, do the necessary modifications, export the diagrams as PNG files, put them in the Readme at relevant places and create a PR.
 
 - Open pull request with improvements
 - Discuss ideas in issues