Add connecting lines

[nkh]

@qindapao

The line objects are non connecting because they are mainly used to draw tables and such. I'm going to add connecting lines types, I think they are useful for non directed graph and general drawings.

I'll probably re-assign the bindings we have for non connecting lines to them so the bindings will have to change.

[qindapao]

@nkh

No problem, according to your plan.

[nkh]

b29afd5

https://github.com/nkh/P5-App-Asciio/blob/b29afd599f2483a951db64b526567b49bd698206/setup/actions/default_bindings.pl#L255-L263