Travis don't like tabs! (he is right :))

.travis.yml

@@ -10,17 +10,17 @@ compiler:
 
 
 script:
-	mkdir build
-	cd build
-	cmake ..
-	make
-	make test
-	cd ..
-	mkdir coverage
-	cd coverage
-	cmake .. -DCOVERALL=ON -DCMAKE_BUILD_TYPE=Debug
-	cmake --build .
-	cmake --build . --target coveralls
+   - mkdir build
+   - cd build
+   - cmake ..
+   - make
+   - make test
+   - cd ..
+   - mkdir coverage
+   - cd coverage
+   - cmake .. -DCOVERALL=ON -DCMAKE_BUILD_TYPE=Debug
+   - cmake --build .
+   - cmake --build . --target coveralls
  
 after_success:
    - bash <(curl -s https://codecov.io/bash)