adding README and images used in it

README.md

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+OXID eShop
+==========
+
+This repository contains the sources of OXID eShop Community Edition.
+
+###About OXID eShop:
+
+OXID eShop is a flexible open source e-commerce software with a wide range of functionalities. 
+Thanks to its modular, modern and state-of-the-art architecture, it can be modified, expanded 
+and customized to individual requirements with the greatest of ease. 
+
+OXID eShop is just e-commerce software for agencies with deadlines :-)
+
+![Image alt](https://raw.github.com/OXID-eSales/oxideshop_ce/master/frontend.png)
+
+
+###Getting involved
+
+OXID eShop is available under two different licenses, GPLv3 and a commercial license.
+
+That's why, before contributing for the first time, you must send the filled form "OXID eSales Contributor Agreement" 
+(http://wiki.oxidforge.org/File:Oxid_esales_ca_v151.pdf) to [email protected]. You can find more 
+information about it on the FAQ page OXID Contribution and Contributor Agreement FAQ
+http://wiki.oxidforge.org/OXID_Contribution_and_Contributor_Agreement_FAQ
+
+Process:
+First off, you have to fork the repository OXID-eSales/oxideshop_ce to your list of repositories. Change whatever you want and push it back to the original repository. Now you'll be asked for signing an OXID Contributor Agreement (this has to be done once). After that we can start checking your code. In every case, whether or not we could take your over your contribution, you'll be informed.
+
+![Image alt](https://raw.github.com/OXID-eSales/oxideshop_ce/master/git_contributor-activity.png)
+
+You will find technical help with Git and GitHub on this place:
+Please refer to https://help.github.com/
+
+Code quality:
+We are still working on providing OXID specific code guidlines and tutorials to you. Until this, we propose to refer to 
+http://framework.zend.com/manual/1.12/en/coding-standard.coding-style.html
+Also, please provide PHP unit tests for your code.
+
+When sending your pull request, please provide a clear, meaningful and detailed information about what your code is about and what it will do, best including a screen shot if possible.
+If you want to discuss your contribution and your code before committing it, please go to the dev-general mailing list: http://lists.oxidforge.org/mailman/listinfo/dev-general.
+
+Useful links:
+Project home page - http://www.oxid-esales.com
+Wiki - http://www.oxidforge.org