Add a Remove-LineForward command

[drowe13]

Is your feature request related to a problem? Please describe.
It is easy to use set-lineforward to forward a line, however there isn't an easy way to UNforward the line after
Describe the solution you'd like
change set-lineforward to add-lineforward, and then create a remove-lineforward

Describe alternatives you've considered
Could add a flag for set-lineforward 1 for add a line forward, and set-lineforward 0 for removing a lineforward

[tealise]

Fixed with release v0.0.1