readme update

README.markdown

@@ -1,5 +1,19 @@
 vim-autoformat
 ==============
 
-html, css, javascript by vim-jsbeautify
-python by autopep8
+This vim plugin provides bindings for external code format programs.
+If you have installed a supported formatter correctly, it will integrate with vim automatically.
+
+Supported programs:
+* einars/jsbeautify for javascript (has to be installed as a pathogen-compatible plugin)
+* autopep8 for python (must be globally available)
+
+How to install (Vundle)
+-----------------------
+
+Put this in your .vimrc
+
+```vim
+Bundle "Chiel92/vim-autoformat"
+```
+