Fix line break in Cisco show bgp ipv4 uni sum

Line break in Cisco parser for show bgp ipv4 unicast summary caused
exception. This happens when the IP address is longer and newline
is inserted to allign columns. And this happens especially when
somebody uses IPv6 peer to transport IPv4 routes.

Fix line breaks using code for IPv6 also in IPv4 handling
code.
add NIX CZ logo
Adding an optional nixcz style
Move additional files from src directory

Followup in the nixcz branch to finish the cleanup started by the
src removal patch in master.