#29 Add support for text properties

[fritzophrenic]

Figure out what text properties are and add support for them. I haven't played with it or used plugins with it yet to know what it is but it sounds similar to syntax highlighting so it should be supported.

[fritzophrenic]

https://github.com/vim/vim/blob/master/runtime/doc/textprop.txt

[fritzophrenic]

Especially see: virtual text! Probably this should be a new candidate for the "uncopyable text" feature.