As a user, I want complete control of the TextWindowInterface

[austinmiller]

Control

• splittable
• echoable
• word wrap style
• clear
• set line by number
• highlightable
• font
• colorscheme

Repaint should happen automatically where appropriate.

[austinmiller]

moving word wrapping to another issue.

[austinmiller]

This was implemented in https://github.com/austinmiller/augustmc/commit/9e9dfd9aeea99dd8b09f0f02be6850115e4792c3