Bugfix/pip2

Signed-off-by: Sebastien Bocahu <sebastien@ispfr.net>

Relative symlinks don't really work (module bug) and would be confusing anyway, better to be explicit.

Conflicts:
	library/yum

Feature/pip module py2.4

add backup= option to copy. makes a backup of the file on the target

Feature/sudo cmd not defined

We need to include the license when we ship RPMs

Include bin/ansible-pull as part of the sdist in distutils.

The `val if something else something-else` syntax does not work prior to 2.5.

The `val if something else something-else` syntax does not work prior to 2.5

in a file named: $filename.YYYY-MM-DD@HH:MM~

backup=False is default

make yum module work with list=pkgspec

It is still required to use list=..., but the typical install and remove
won't need it.

Update man pages and the message for an exception.

Added commit time information to the --version output

Now prints date of commit (and timezone offset of commit)
Hopefully resolves #783

Only run yum,apt through the with_items loop if there is a list of items.  Just a cosmetic fix on return values
for the most part.