v0.7
- Make yVa work with paste/undo
- implement undo for search/replace (one undo for noninteractie, one by one for interactive)
v0.8
- start with all searches from a prefix and go over them
- add complete for search, go over it with tab
- add complete for ctrl+n, go over it with ctrl+n in insert mode
v0.9
- render utf8 as in vi (just show the \x432 like elements)
