Enable coveralls

.travis.yml

@@ -4,12 +4,16 @@ ghc:
   - 7.8
 
 script:
-  - cabal configure --enable-tests && cabal build && cabal test
+  - cabal configure --enable-tests --enable-library-coverage && cabal build && cabal test
   - cabal check
   - cabal sdist
   - cabal install doctest
   - ./test-docs.sh
 
+after_script:
+  - cabal install hpc-coveralls
+  - hpc-coveralls --exclude-dir=test spec
+
 notifications:
   irc:
     channels:

README.md

@@ -1,6 +1,7 @@
 # servant
 
 [![Build Status](https://secure.travis-ci.org/haskell-servant/servant.svg)](http://travis-ci.org/haskell-servant/servant)
+[![Coverage Status](https://coveralls.io/repos/haskell-servant/servant/badge.svg)](https://coveralls.io/r/haskell-servant/servant)
 
 ![servant](https://raw.githubusercontent.com/haskell-servant/servant/master/servant.png)