Patch from Maxim Kolosov for Py3 fixes in agw.aui

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73907 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Modified patch from Maxim Kolosov for Py3 fixes in wx.py

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73908 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
More FloatCanvas updates from Werner

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73909 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
More pubsub test updates from Werner

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73910 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
write temp file to unittests folder, and remove it when done

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73911 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Change README .txt to .rst, add lots more info.

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73912 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Improve build.py command and option help text.

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73913 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
fix some typos, add a bit more text

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73914 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775