Merge pull request #26 from jmccrohan/master

Fix hyphen-used-as-minus-sign in nyancat.1
1.2.1
Update nyancat.1
Update links and MOTD text
bump version
Exit gracefully when stdout becomes invalid
Merge pull request #27 from Herringway/master

Exit gracefully when piped stdout becomes invalid
Add option to skip intro in telnet mode.

I am dropping the intro from my instance and also making it not run
permanently (sorry, limited bandwidth until I get this on a dedicated
cloud instance somewhere).
Long-form option for skip-intro and update manpage
Bump version, update changelog
Some major improvements here.
Fix telnet size negotiation
Add systemd unit files

Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com>
Allow build flags to be overridden by make process

Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com>