" Toggle line numbers {{{1
" needs to be here to override unimpaired maps
function! g:ToggleNumber()
    if !exists("b:relanum")
        let b:relanum=1
    endif
    if &l:number
        let b:relanum = &relativenumber
        setlocal nonumber norelativenumber
    else
        let &l:relativenumber = b:relanum
        setlocal number
    endif
endfunction
nnoremap con :call g:ToggleNumber()<cr>