reinplace on OSX 10.8 seems to behave differently, this change has been tested
on a few 10.8 and 10.7 machines.

Reorganised packaging and added some notes for less experienced users
on how to get the development version of ansible installed using macports.

Insert some notes about installing on OSX via macports

See this post - https://groups.google.com/forum/?fromgroups=#!topic/ansible-project/7xdC0MP9MjM

I was not aware that blair had uploaded a portfile to macports already,
this set of changes makes the 'devel' version of the portfile similar
to the upstream. Except the man pages, examples and sample config files.