py3: port ship to py3 imports

src/Mod/Ship/shipCreateWeight/TaskPanel.py

@@ -23,9 +23,9 @@
 
 import FreeCAD as App
 import FreeCADGui as Gui
-import Units
+from FreeCAD import Units
 from PySide import QtGui, QtCore
-import Tools
+from . import Tools
 import WeightInstance as Instance
 from shipUtils import Paths
 import shipUtils.Units as USys

src/Mod/Ship/shipCreateWeight/__init__.py

@@ -21,7 +21,7 @@
 #*                                                                         *
 #***************************************************************************
 
-import TaskPanel
+from . import TaskPanel
 
 
 def load():