Added link to relishapp documentation

And changed README to README.md

Author: despo

README

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+# Ruby Refactoring Tool for Vim
+
+I love vim! It's my editor of choice when I am developing software.
+
+Currently (for the last 4 years at least) I have been working mainly
+with the Ruby Programming Language.
+
+I have been missing a refactoring tool for a while (like the ones you
+can find in IDE's) while I am developing, but I never had the nerve
+to dwell into vim script to actually code my own.
+
+Recently (a couple of weeks ago) Gary Bernhardt presented his vim
+configuration in the Software Craftsmanship User Group UK and he
+showed us the two refactoring patterns he has written in vim script.
+
+Initially I just thought "cool", but it didn't really sink in until
+a couple of weeks later.
+
+So now I have decided to code this in vim script, but I am not sure how far
+I will go with it (clone at your own risk).
+
+   N.B. 'Rename Local Variable', 'Rename Instance Variable' and 'ExtractMethod' require matchit.vim:
+
+[http://www.vim.org/scripts/script.php?script_id=39](http://relishapp.com/despo/vim-ruby-refactoring)
+   
+## Implemented commands/patterns:
+   
+    :RAddParameter           - Add Parameter 
+    :RInlineTemp             - Inline Temp
+    :RConvertPostConditional - Convert Post Conditional
+    :RExtractConstant        - Extract Constant          (visual selection)
+    :RExtractLet             - Extract to Let (Rspec)
+    :RExtractLocalVariable   - Extract Local Variable    (visual selection)
+    :RRenameLocalVariable    - Rename Local Variable     (visual selection/variable under the cursor, *REQUIRES matchit.vim*)
+    :RRenameInstanceVariable - Rename Instance Variable  (visual selection, *REQUIRES matchit.vim*)
+    :RExtractMethod          - Extract Method            (visual selection, *REQUIRES matchit.vim*)
+
+Default bindings:
+
+    :nnoremap <leader>rap  :RAddParameter<cr>
+    :nnoremap <leader>rcpc :RConvertPostConditional<cr>
+    :nnoremap <leader>rel  :RExtractLet<cr>
+    :vnoremap <leader>rec  :RExtractConstant<cr>
+    :vnoremap <leader>relv :RExtractLocalVariable<cr>
+    :nnoremap <leader>rit  :RInlineTemp<cr>
+    :vnoremap <leader>rrlv :RRenameLocalVariable<cr>
+    :vnoremap <leader>rriv :RRenameInstanceVariable<cr>
+    :vnoremap <leader>rem  :RExtractMethod<cr>
+
+Additional usage examples (thanks Justin!):
+[http://justinram.wordpress.com/2010/12/30/vim-ruby-refactoring-series/](http://justinram.wordpress.com/2010/12/30/vim-ruby-refactoring-series/)
+
+## Documentation
+[http://relishapp.com/despo/vim-ruby-refactoring](http://relishapp.com/despo/vim-ruby-refactoring)
+
+Enrique Comba Riepenhausen & Paul King
+