Fix issue #11

Complete function assumed that a line started with x <date> or a
priority which is not necessarily true, thus some lines where ignored
from completion.

autoload/todo.vim

@@ -350,7 +350,7 @@ fun! todo#Complete(findstart, base)
         let res = []
         for bufnr in range(1,bufnr('$'))
             let lines=getbufline(bufnr,1,"$")
-            for line in lines
+            for line in lines
                 if line =~ " ".a:base
                     " init temporary item
                     let item={}