Added sharp key (#) to the terminal escaped keys workaround. Plus GUI.
Enhanced jk's behaviour by adding jk<Space>, which will :update the file
as well as doing what jk does.
Added some insert mode mappings to fullstop (.), comma (,) to select
pummode entry (if selected) before it spits the associated character.
Added TODO for tweaking auto-pairs for same behaviour on <Space> and
opening paranthesis. They are auto-pairs ruling characters.