MNT: hard code the coverage report location

.coveragerc

@@ -1,7 +1,6 @@
 [run]
-source = 
-    pyqtgraph
-
+source = pyqtgraph
+branch = True
 [report]
 omit =
     */python?.?/*
@@ -9,3 +8,12 @@ omit =
     *test*
     */__pycache__/*
     *.pyc
+exclude_lines =
+    pragma: no cover
+    def __repr__
+    if self\.debug
+    raise AssertionError
+    raise NotImplementedError
+    if 0:
+    if __name__ == .__main__.:
+ignore_errors = True

.travis.yml

@@ -182,6 +182,6 @@ script:
       check_output "import test";
 
 after_success:
-  - cd ~/repo-clone
+  - cd /home/travis/build/pyqtgraph/pyqtgraph
   - codecov
   - coveralls