Don't use relative imports in the tools scripts

wx/tools/img2png.py

@@ -37,7 +37,7 @@ Options:
 
 import  sys
 import  wx
-from . import img2img
+from wx.tools import img2img
 
 app = None
 def main():

wx/tools/img2py.py

@@ -88,7 +88,7 @@ import sys
 import tempfile
 
 import wx
-from . import img2img
+from wx.tools import img2img
 
 try:
     b64encode = base64.b64encode

wx/tools/img2xpm.py

@@ -36,7 +36,7 @@ Options:
 
 import  sys
 import  wx
-from . import img2img
+from wx.tools import img2img
 
 app = None
 def main():

wx/tools/wxget_docs_demo.py

@@ -45,10 +45,7 @@ else:
     from urllib import pathname2url
 
 import wx
-try:
-    import wxget
-except ImportError:
-    from . import wxget
+from wx.tools import wxget
 
 print(sys.version_info, sys.version, sys.argv)
 APP = None