Fix and improve links to project-specific github orgs

Produced bad links as protocols were missing

README.md

@@ -104,12 +104,12 @@ Founded in spring 2015, the Guild exists for Zalando technologists to discuss OS
 Once formed, the OSS Team will offer guidance to structure the Guild into working groups on mentoring, quality, external community building, and documentation.
 <a name="A4"></a>
 ### Appendix 4: Zalando’s Public GitHub organizations 
-+ [github.com/zalando](github.com/zalando): Where we showcase our strongest projects
-+ [github.com/zalando-incubator](github.com/zalando-incubator): Where we incubate new projects, giving them six months to grow audiences and develop.
-+ [github.com/zalando-stups](github.com/zalando-stups): Setup/purpose in review.
-+ [github.com/zalando-nakadi](github.com/zalando-nakadi): For all repos related to the Nakadi project. Setup/purpose in review.
-+ [github.com/zalando-zmon](github.com/zalando-zmon): For all repos related to the ZMON project. Setup/purpose in review.
-+ [github.com/zalandoresearch](github.com/zalandoresearch): For all repos and code samples generated by Zalando Research. Setup/purpose in review.
++ [zalando](https://github.com/zalando): Where we showcase our strongest projects
++ [zalando-incubator](github.com/zalando-incubator): Where we incubate new projects, giving them six months to grow audiences and develop.
++ [zalando-stups](https://github.com/zalando-stups): Setup/purpose in review.
++ [zalando-nakadi](https://github.com/zalando-nakadi): For all repos related to the Nakadi project. Setup/purpose in review.
++ [zalando-zmon](https://github.com/zalando-zmon): For all repos related to the ZMON project. Setup/purpose in review.
++ [zalandoresearch](https://github.com/zalandoresearch): For all repos and code samples generated by Zalando Research. Setup/purpose in review.
 
 <a name="A5"></a>
 ### Appendix 5: How to deprecate a project