[ANN] IdeaVIM Plugin 0.8.2

Updated plugin.xml so it shows up under Pallada plus a few small bug fixes:

- Fixed NullPointerException when using the :qall, :q, or :wq commands.
- Fixed the :edit, :next, :previous, :argument, :first, and :last commands. These were broken by the focus fix in 0.7.2.