add badges for build status. prepare badge for test coverage with links to gitlab pages

README.md

 # BioEM:  Bayesian inference of Electron Microscopy
 # 1.0 VERSION: June, 2016
 
+## Build status and test coverage
+
+[![Build status](https://gitlab.mpcdf.mpg.de/MPIBP-Hummer/BioEM/badges/master/build.svg)](https://gitlab.mpcdf.mpg.de/MPIBP-Hummer/BioEM/commits/master)
+[![Code coverage](https://gitlab.mpcdf.mpg.de/MPIBP-Hummer/BioEM/badges/master/coverage.svg)](http://MPIBP-Hummer.pages.mpcdf.de/BioEM/) 
+
 
 ## Contributors