Merge branch '182-let-s-use-gitlab-badges-instead-of-ones-no-more-used' into 'master'

Update README.md

Closes #182

See merge request !182

README.md

-[![Build Status](https://travis-ci.org/political-memory/political_memory.svg?branch=master)](https://travis-ci.org/political-memory/political_memory)
-[![codecov.io](https://codecov.io/github/political-memory/political_memory/coverage.svg?branch=master)](https://codecov.io/github/political-memory/political_memory?branch=master)
+[![build status](https://git.laquadrature.net/memopol/memopol/badges/master/build.svg)](https://git.laquadrature.net/memopol/memopol/commits/master)
+[![coverage report](https://git.laquadrature.net/memopol/memopol/badges/master/coverage.svg)](https://git.laquadrature.net/memopol/memopol/commits/master)
 
 [Manual](http://memopol.readthedocs.io/en/master/index.html)
\ No newline at end of file