Adds basic readme based on syntastic's one.

README

@@ -1,6 +0,0 @@
-This is a mirror of http://www.vim.org/scripts/script.php?script_id=2632
-
-Syntax file for Nimrod.
-
-This file is basically a modified python.vim (http://www.vim.org/scripts/script.php?script_id=790) ... you might recognize it.
-I have no idea if it works because I haven't actually tried to code in Nimrod and have next to nothing to test it with :P

README.markdown

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+Nimrod language support for Vim
+-------------------------------
+
+This provides [Nimrod](http://nimrod-code.org) language support for Vim:
+
+* Syntax highlighting
+* Auto-indent
+* Build/jump to errors within Vim
+* Project navigation and Jump to Definition (cgats or compiler-assisted
+  idetools).
+
+The source of this script comes mainly from
+http://www.vim.org/scripts/script.php?script_id=2632, which comes from a
+modified python.vim (http://www.vim.org/scripts/script.php?script_id=790).
+
+Installation
+------------
+
+Installing `nimrod.vim` is easy but first you need to have the pathogen plugin
+installed.  If you already have pathogen working then skip Step 1 and go to
+Step 2.
+
+Step 1: Install pathogen.vim
+----------------------------
+
+First I'll show you how to install tpope's
+[pathogen.vim](https://github.com/tpope/vim-pathogen) so that it's easy to
+install `nimrod.vim`.  Do this in your Terminal so that you get the
+`pathogen.vim` file and the directories it needs:
+
+    mkdir -p ~/.vim/autoload ~/.vim/bundle; \
+    curl -so ~/.vim/autoload/pathogen.vim \
+        https://raw.github.com/tpope/vim-pathogen/master/autoload/pathogen.vim
+
+Next you *need to add this* to your `~/.vimrc`:
+
+    call pathogen#infect()
+
+Step 2: Install nimrod.vim as a pathogen bundle
+-----------------------------------------------
+
+You now have pathogen installed and can put `nimrod.vim` into `~/.vim/bundle`
+like this:
+
+    cd ~/.vim/bundle
+    git clone git://github.com/zah/nimrod.vim.git
+
+Next you *need to add this* to your `~/.vimrc`:
+
+    fun! JumpToDef()
+      if exists("*GotoDefinition_" . &filetype)
+        call GotoDefinition_{&filetype}()
+      else
+        exe "norm! \<C-]>"
+      endif
+    endf
+    
+    " Jump to tag
+    nn <M-g> :call JumpToDef()<cr>
+    ino <M-g> <esc>:call JumpToDef()<cr>i
+
+The `JumpToDef` function hooks the `nimrod.vim` plugin to invoke the nimrod
+compiler with the appropriate idetools command. Pressing meta+g will then jump
+to the definition of the word your cursor is on. This uses the nimrod compiler
+instead of ctags, so it works on any nimrod file which is compilable without
+requiring you to maintain a database file.
+
+Other recomended Vim plugins
+----------------------------
+
+* https://github.com/scrooloose/syntastic (copied bits from its readme)
+* https://github.com/Shougo/neocomplcache