repeat: Add plugin, version 1.0.

Adds repeat support (.) to plugins. Used by surround.vim.

diff --git a/plugin/repeat.vim b/plugin/repeat.vim
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+" repeat.vim - Let the repeat command repeat plugin maps
+" Maintainer:   Tim Pope
+" Version:      1.0
+
+" Installation:
+" Place in either ~/.vim/plugin/repeat.vim (to load at start up) or
+" ~/.vim/autoload/repeat.vim (to load automatically as needed).
+"
+" Developers:
+" Basic usage is as follows:
+"
+"   silent! call repeat#set("\<Plug>MappingToRepeatCommand",3)
+"
+" The first argument is the mapping that will be invoked when the |.| key is
+" pressed.  Typically, it will be the same as the mapping the user invoked.
+" This sequence will be stuffed into the input queue literally.  Thus you must
+" encode special keys by prefixing them with a backslash inside double quotes.
+"
+" The second argument is the default count.  This is the number that will be
+" prefixed to the mapping if no explicit numeric argument was given.  The
+" value of the v:count variable is usually correct and it will be used if the
+" second parameter is omitted.  If your mapping doesn't accept a numeric
+" argument and you never want to receive one, pass a value of -1.
+"
+" Make sure to call the repeat#set function _after_ making changes to the
+" file.
+
+if exists("g:loaded_repeat") || &cp || v:version < 700
+    finish
+endif
+let g:loaded_repeat = 1
+
+let g:repeat_tick = -1
+
+function! repeat#set(sequence,...)
+    silent exe "norm! \"=''\<CR>p"
+    let g:repeat_sequence = a:sequence
+    let g:repeat_count = a:0 ? a:1 : v:count
+    let g:repeat_tick = b:changedtick
+endfunction
+
+function! s:repeat(count)
+    if g:repeat_tick == b:changedtick
+        let c = g:repeat_count
+        let s = g:repeat_sequence
+        let cnt = c == -1 ? "" : (a:count ? a:count : (c ? c : ''))
+        call feedkeys(cnt . s)
+    else
+        call feedkeys((a:count ? a:count : '') . '.', 'n')
+    endif
+endfunction
+
+function! s:wrap(command,count)
+    let preserve = (g:repeat_tick == b:changedtick)
+    exe 'norm! '.(a:count ? a:count : '').a:command
+    if preserve
+        let g:repeat_tick = b:changedtick
+    endif
+endfunction
+
+nnoremap <silent> .     :<C-U>call <SID>repeat(v:count)<CR>
+nnoremap <silent> u     :<C-U>call <SID>wrap('u',v:count)<CR>
+nnoremap <silent> U     :<C-U>call <SID>wrap('U',v:count)<CR>
+nnoremap <silent> <C-R> :<C-U>call <SID>wrap("\<Lt>C-R>",v:count)<CR>
+
+augroup repeatPlugin
+    autocmd!
+    autocmd BufLeave,BufWritePre,BufReadPre * let g:repeat_tick = (g:repeat_tick == b:changedtick || g:repeat_tick == 0) ? 0 : -1
+    autocmd BufEnter,BufWritePost * if g:repeat_tick == 0|let g:repeat_tick = b:changedtick|endif
+augroup END
+
+" vim:set ft=vim et sw=4 sts=4: