Now Autocomplete in StackedInlines, is supported. I guess
Removiendo el tag de extrafilters.
Replaced the plugin with a newer version that fixes the bug with IE9.
Merge remote-tracking branch 'boralyl-github/master'
Merge remote-tracking branch 'votaguz-github/master'
Split out a can_autocomplete method to make the code more elegant

This was in an effort to make many to many fields work, but the
problem was completely elsewhere. Leave it in because it's a nice
thing to have.