put a README.txt file in the .padre directory

[szabgab]

I am now trying to clean up the .something directories in my home directory and I see lots of subdirs that I have no idea what are they, if I should back them up or I can disregard them.
It would be a nice thing to have a README.txt file in that directory that either explains the content or points to the web page where it is explained.

e.g. What parts of the .padre hold what information. Which should be backed up which are more important and which are less so.