fixed travis env, added coverage badge

.travis.yml

 language: ruby
 env:
-  - DB=mysql
-  - TRAVIS=true
+  - DB=mysql TRAVIS=true
 before_install:
   - sudo apt-get install libicu-dev -y
   - gem install charlock_holmes -v="0.6.9"

README.md

@@ -24,6 +24,8 @@
 * [![Dependency Status](https://gemnasium.com/gitlabhq/gitlabhq.png)](https://gemnasium.com/gitlabhq/gitlabhq)
+* [![Coverage Status](https://coveralls.io/repos/gitlabhq/gitlabhq/badge.png?branch=master)](https://coveralls.io/r/gitlabhq/gitlabhq)
+
 ### Resources
 * GitLab.org community site: [Homepage](http://gitlab.org) [Screenshots](http://gitlab.org/screenshots/) [Blog](http://blog.gitlab.org/) [Demo](http://demo.gitlabhq.com/users/sign_in)