Moved script-local function s:unique() to autoload script

On the one hand I don't want to force people to download half my Vim profile
before they can try one of the plug-ins I've written, but on the other hand I
don't want to keep copy/pasting miscellaneous functions all over the place...

Makefile

@@ -1,5 +1,6 @@
-DEPENDS=$(HOME)/.vim/autoload/xolox/escape.vim \
-		$(HOME)/.vim/autoload/xolox/timer.vim
+DEPENDS=autoload/xolox.vim \
+		autoload/xolox/escape.vim \
+		autoload/xolox/timer.vim
 VIMDOC=doc/easytags.txt
 HTMLDOC=doc/readme.html
 ZIPDIR := $(shell mktemp -d)
@@ -14,7 +15,7 @@ archive: Makefile easytags.vim autoload.vim $(VIMDOC) $(HTMLDOC)
 	@mkdir -p $(ZIPDIR)/plugin $(ZIPDIR)/autoload/xolox $(ZIPDIR)/doc
 	@cp easytags.vim $(ZIPDIR)/plugin
 	@cp autoload.vim $(ZIPDIR)/autoload/easytags.vim
-	@cp $(DEPENDS) $(ZIPDIR)/autoload/xolox
+	@for SCRIPT in $(DEPENDS); do cp $$HOME/.vim/$$SCRIPT $(ZIPDIR)/$$SCRIPT; done
 	@cp $(VIMDOC) $(ZIPDIR)/doc/easytags.txt
 	@cp $(HTMLDOC) $(ZIPDIR)/doc/easytags.html
 	@cd $(ZIPDIR) && zip -r $(ZIPFILE) . >/dev/null

autoload.vim

@@ -95,7 +95,7 @@ function! easytags#highlight_cmd() " {{{1
       endif
       let matches = filter(copy(taglist), tagkind.filter)
       call map(matches, 'xolox#escape#pattern(get(v:val, "name"))')
-      let pattern = tagkind.pattern_prefix . '\%(' . join(s:unique(matches), '\|') . '\)' . tagkind.pattern_suffix
+      let pattern = tagkind.pattern_prefix . '\%(' . join(xolox#unique(matches), '\|') . '\)' . tagkind.pattern_suffix
       let command = 'syntax match %s /%s/ containedin=ALLBUT,.*String.*,.*Comment.*'
       execute printf(command, hlgroup_tagged, escape(pattern, '/'))
     endfor
@@ -104,21 +104,6 @@ function! easytags#highlight_cmd() " {{{1
   endif
 endfunction
 
-function! s:unique(list)
-	let index = 0
-	while index < len(a:list)
-		let value = a:list[index]
-		let match = index(a:list, value, index+1)
-		if match >= 0
-			call remove(a:list, match)
-		else
-			let index += 1
-		endif
-		unlet value
-	endwhile
-	return a:list
-endfunction
-
 function! easytags#get_tagsfile() " {{{1
   let tagsfile = expand(g:easytags_file)
   if filereadable(tagsfile) && filewritable(tagsfile) != 1