I presume bin/ was initially ignored based on the project layout dictated by some packaging tool, however not all python projects use these layouts. bin/ is normally for executables, so ignoring it by default seems like a bad idea.
As for Mr Developer and Rope: I don't know that they are particularly widespread tools and even if they were, the rules here look suspiciously like those IDE project files that people like to ignore but really shouldn't.
Stop ignoring bin/ in Python template
Remove Mr Developer and Rope rules from Python template
Group gettext files in the Python template
Since nobody has objected to this so far, I'll go ahead and merge. I acknowledge that something still needs to be done to address the use-case of buildout, but I'll defer that to #955.
What was the reason for removing bin/ ? In projects that use buildout that is a quite common directory to ignore
In addition, this means that VirtualEnv stuff isn't ignored.