* Change the opening commands to the tag-matchlist commands.
* Stop using taglist() so we don't have to worry about &l:tags.
* Persistent caching for tags.
* Continue #27.
* Save and restore &l:tags when creating a new buffer,
workaround for easytags.vim changing the buffer's &l:tags
and allow using <c-x> <c-t> <c-v> and <cr> to open file.
* New caching method, remove the need for <F5>.
* Continue #27.
