vim. Add quickfix support

contrib/vim/README

@@ -2,7 +2,7 @@
 This is the ledger filetype for vim.
 Copy each file to the corresponding directory in your ~/.vim directory.
 Then include the following line in your .vimrc  or in ~/.vim/filetype.vim
-  au BufNewFile,BufRead *.ldg,*.ledger setf ledger
+  au BufNewFile,BufRead *.ldg,*.ledger setf ledger | comp ledger
 You can also use a modeline like this in every ledger file
   vim:filetype=ledger
 

contrib/vim/compiler/ledger.vim

@@ -0,0 +1,22 @@
+" Vim Compiler File
+" Compiler:	ledger
+" by Johann Klähn; Use according to the terms of the GPL>=2.
+" vim:ts=2:sw=2:sts=2:foldmethod=marker
+
+if exists("current_compiler")
+  finish
+endif
+let current_compiler = "ledger"
+
+if exists(":CompilerSet") != 2
+  command -nargs=* CompilerSet setlocal <args>
+endif
+
+" %-G throws away blank lines, everything else is assumed to be part of a
+" multi-line error message.
+CompilerSet errorformat=%-G,%EWhile\ parsing\ file\ \"%f\"\\,\ line\ %l:%.%#,%ZError:\ %m,%C%.%#
+
+" unfortunately there is no 'check file' command, 
+" so we will just use a query that returns no results. ever.
+CompilerSet makeprg=ledger\ -f\ %\ reg\ not\ '.*'\ \>\ /dev/null
+