Update pprint to use gentoo-functions

Added several additional functions including euser, eusern, esuccess,
and esuccessn.  Also changed the info color to blue and added INFO and
USER colors.
Update setup to use the updated pprint gentoo-functions

Now using gentoo-functions for pprint,
https://github.com/gentoo/gentoo-functions/blob/master/functions.sh.
Decided to source pprint rather than call it as an executable since it
works much faster this way.