run 2to3
decode output from subprocess commands
update % interpolation to .format(...)
ignore vim droppings
fix parenthesis
make it work on python2
add to credits
revert to /usr/bin/python

see http://legacy.python.org/dev/peps/pep-0394/ for rationale
Merge branch 'scholarly-python3'
Break some long lines into shorter ones.
Added requirements section in README.
Removed extra spaces at the end of each line.
Remove whitespaces at the end of line, move "Requirements" section to
ssh-ident, where it was supposed to be to begin with, move from future
... after the file docstring (otherwise pydoc doesn't generate / show
the documentation correctly), and update the README with pydoc ssh-ident
> README.
GIT Ignore ssh-identc (compiled ssh-ident).
Provide simple installation instrucitons.
By default, don't keep keys in memory for more than two hours.
Update documentation to mention the 7200s life time for keys, by
default.