Add option to switch off ipv6.
Merge pull request #60 from aitjcize/ipv4

Add option to switch off ipv6.
allow friendlist to scroll up and down if friends overflow the window
fix for possible divsion by zero
allow groupchat sidebar to scroll
small fix
colour theme changes
API change
fix bug
don't sort after every friend add on statup
fix prompt user input mechanics
allow line editing in prompt window
a few fixes and update version
put back prompt char
fix prompt bug, improve comments, and give prompt its own window struct
fix line scrolling bug
cchange prompt to $ char and make timestamps blue
add line kill and discard ability
fix
partially fix bug where input line eats prompt messages