forked from PsychoticNinja/irssi
- completely removed the old textbuffer representation ( https://github.com/shabble/irssi-docs/wiki/Notes-256-Colour#textbuffer-encoding ) - textbuffer-formats is an extra module, so if we unhook the signals it should go back to the "old way" of storing pre-rendered tex - design uses cache, original formats and list of arguments