Updated README.markdown to explain how to set up and use YouCompleteMe.

README.markdown

@@ -293,6 +293,37 @@ NeoComplCache is an amazing autocomplete plugin with additional support for snip
 
 ![neocomplcache image][autocomplete-img]
 
+## [YouCompleteMe]
+
+[YouCompleteMe](https://github.com/Valloric/YouCompleteMe) is another amazing
+completion engine. It is slightly more involved to set up as it contains a
+binary component that the user needs to compile before it will work. As a
+result of this however it is very fast.
+
+To enable YouCompleteMe add `YouCompleteMe` to your list of groups by
+overriding it in your `.vimrc.bundles.local` like so:
+`let g:spf13_bundle_groups=['general', 'programming', 'misc', 'scala', 'YouCompleteMe']`
+This is just an example. Remember to choose the other groups you want here.
+
+Once you have done this you will need to get Vundle to grab the latest code
+from git. You can do this by calling `:BundleInstall!`. You should see
+YouCompleteMe in the list.
+
+You will now have the code in your bundles directory and can proceed to compile
+the core. Change to the directory it has been downloaded to. If you have a
+vanilla install then `cd ~/.spf13-vim-3/.vim/bundle/YouCompleteMe/` should do the
+trick. You should see a file in this directory called install.sh. There are a
+few options to consider before running the installer:
+
+  * Do you want clang support (if you don't know what this is then you likely don't need it)?
+    * Do you want to link against a local libclang or have the installer download the latest for you?
+  * Do you want support for c# via the omnisharp server?
+
+The plugin is well documented on the site linked above. Be sure to give that a
+read and make sure you understand the options you require.
+
+For java users wanting to use eclim be sure to add `let g:EclimCompletionMethod = 'omnifunc'` to your .vimrc.local.
+
 ## [Syntastic]
 
 Syntastic is a syntax checking plugin that runs buffers through external syntax