A simple syntax highlighting for todo.txt in kate and kdevelop
"x" at the begining of a line mark a task done, and are hightlighted as lightgray.
(A) Priority begins with ( and end with ), and are hightlighted as bold.
YYYY-MM-DD Date format is YYYY-MM-DD, and are hightlighted as bold.
Project stat with +. This is a +project, and are hightlighted as green.
Tags start with @. This is a @tag, and are hightlighted as red.
https://github.com/ginatrapani/todo.txt-cli/wiki/The-Todo.txt-Format
