Run command sometimes returns success even when command fails.

UTF-8 support has not been tested, and probably needs some work.

More comments in source code.

Tooltips? (I think the interface is easy enough, but... I'm the one who made it.)

Search/Replace in multiple documents? (Why? It can already be done easily from a Lua script.)

Printing? (It's already somewhat possible with pdf export + lpr + Lua.)

Customizable pattern recognition for output pane. (Why not just reformat output via a shell script?)

Configurable key bindings for scintilla?

Maybe add config settings for:
  SCI_SETWORDCHARS, SCI_SETWHITESPACECHARS, SCI_SETBUFFEREDDRAW, SCI_SETTWOPHASEDRAW


Windows port:
  * Needs heavy testing!!!

