vim-twodo - To-do list syntax highlighting and mappings

Age	Commit message (Collapse)	Author
2020-03-22	Add license headers	Teddy Wing
	Add a license header to each source file, along with the appropriate copyright years.
2016-04-26	Highlight deleted TODOs	Teddy Wing
	Show them in Ignore so that they're not as prominent.
2016-04-21	Highlight completed tasks as `Ignore`	Teddy Wing
	Use the `Ignore` highlight group to colour completed tasks. This makes them less visible and get out of the way.
2016-04-20	Add a highlight category for unimportant tasks	Teddy Wing
	Have low priority tasks start with `_` instead of `-`. Highlight these separately with the `Ignore` group to visually de-emphasize them.
2016-04-20	Highlight important tasks	Teddy Wing
	Important tasks start with a `!` instead of a `-`. Highlight them separately from normal tasks so that they can be visually distinguished. Here we use the Error highlight group for them because it's red (at least in my colour scheme).
2016-04-05	syntax/todo.vim: Highlight TODOs that start with whitespace	Teddy Wing
	Subtasks get indented. This will highlight undone tasks even if there's whitespace in front of them.
2016-04-05	syntax/todo.vim: Remove old highlight code	Teddy Wing
	These lines were copied from my manual highlighting of TODO files created a few days ago. They served as a guide while creating the highlighting in the syntax file.
2016-04-05	Add syntax file	Teddy Wing
	Based on Ch. 45 of Learn Vimscript the Hard Way (http://learnvimscriptthehardway.stevelosh.com/chapters/45.html). Highlights undone TODOs as Vim `Statement`s.