Bugfixes against python3 updates.

Everything appears wo be working as normal in Python2
Python3 is still only partially functional.

configfile.py

@@ -51,7 +51,7 @@ def readConfigFile(fname):
     try:
         #os.chdir(newDir)  ## bad.
         fd = open(fname)
-        s = asUnicode(fd.read(), 'UTF-8')
+        s = asUnicode(fd.read())
         fd.close()
         s = s.replace("\r\n", "\n")
         s = s.replace("\r", "\n")

dockarea/Dock.py

@@ -64,6 +64,12 @@ class Dock(QtGui.QWidget, DockDrop):
         
         self.setStretch(*size)
 
+    def implements(self, name=None):
+        if name is None:
+            return ['dock']
+        else:
+            return name == 'dock'
+        
     def setStretch(self, x=None, y=None):
         #print "setStretch", self, x, y
         #self._stretch = (x, y)

dockarea/DockDrop.py

@@ -20,7 +20,8 @@ class DockDrop(object):
         self.overlay.raise_()
     
     def dragEnterEvent(self, ev):
-        if isinstance(ev.source(), Dock.Dock):
+        src = ev.source()
+        if hasattr(src, 'implements') and src.implements('dock'):
             #print "drag enter accept"
             ev.accept()
         else:
@@ -125,5 +126,3 @@ class DropAreaOverlay(QtGui.QWidget):
         p.setBrush(QtGui.QBrush(QtGui.QColor(100, 100, 255, 50)))
         p.setPen(QtGui.QPen(QtGui.QColor(50, 50, 150), 3))
         p.drawRect(rgn)
-
-from . import Dock