add coverage report

.travis.yml

@@ -19,15 +19,15 @@ before_install:
   - "conda info -a"
 
 install:
-  - "conda create --yes -n test-env python=$TRAVIS_PYTHON_VERSION pip numpy>=1.7 cython>=0.24 pyproj>=1.9 gdal>=2.1 libgdal>=2.1 coverage"
+  - "conda create --yes -n test-env python=$TRAVIS_PYTHON_VERSION pip numpy>=1.7 cython>=0.24 pyproj>=1.9 gdal>=2.1 libgdal>=2.1 coverage shapely>=1.5"
   - "source activate test-env"
   - "pip install -r requirements.txt"
-  - "pip install shapely"   # used to verify __geo_interface__
   - "pip install coveralls"
   - "pip install . --no-deps"
+  - "rm -rf karta/"
 
 script:
-  coverage run --source=karta tests/runtests.py
+  coverage run --source=karta tests/runtests.py && coverage report
 
 after_success:
   coveralls