removed pyc files, fixed import bug

Qt.py

 ## Do all Qt imports from here to allow easier PyQt / PySide compatibility
 
+#from PySide import QtGui, QtCore, QtOpenGL, QtSvg
 from PyQt4 import QtGui, QtCore, QtOpenGL, QtSvg
 if not hasattr(QtCore, 'Signal'):
     QtCore.Signal = QtCore.pyqtSignal

graphicsItems/GraphicsItemMethods.py

@@ -3,7 +3,7 @@ from pyqtgraph.GraphicsScene import GraphicsScene
 from pyqtgraph.Point import Point
 import weakref
 
-class GraphicsItemMethods:
+class GraphicsItemMethods(object):
     """
     Class providing useful methods to GraphicsObject and GraphicsWidget.
     """
@@ -253,4 +253,4 @@ class GraphicsItemMethods:
         
         
         
-        
\ No newline at end of file
+        

graphicsItems/PlotItem/PlotItem.py

@@ -24,6 +24,7 @@ from pyqtgraph.widgets.FileDialog import FileDialog
 import weakref
 #from types import *
 import numpy as np
+import os
 #from .. PlotCurveItem import PlotCurveItem
 #from .. ScatterPlotItem import ScatterPlotItem
 from .. PlotDataItem import PlotDataItem