correct .travis.yml

.gitignore

@@ -2,4 +2,5 @@
 .project
 .pydevproject
 htmlcov/
-.coverage
+.coverage
+.settings

.travis.yml

@@ -10,6 +10,6 @@ install:
   - pip install nose2
   - pip install coveralls
 script: 
-  - nose2 --with-coverage --coverage pypog
+  - nose2
 after_success:
   coveralls

tools/gridviewer/GridViewer.py

@@ -5,9 +5,8 @@
 
 from timeit import timeit
 
-from PyQt5.Qt import Qt, QEvent, QRectF
+from PyQt5.Qt import Qt, QEvent
 from PyQt5.QtCore import QPointF
-from PyQt5.QtGui import QPolygonF
 from PyQt5.QtWidgets import QMainWindow, \
     QApplication, QGraphicsScene, QGraphicsView
 import yaml