Pokemon Showdown! integration

[mirekdlugosz]

Pokémon Showdown! is widely used Pokémon battle simulator. Team description format it uses is de-facto standard for Pokémon community.

It would be cool to support that format as well. Users should be able to import their Pokémon Showdown! teams into our tool and export team from our tool into Pokémon Showdown!

UI for this new function must be designed. It might be popup-like box with textarea accessible on click of button. Button should be visible, but easy to ignore for people who don't use Pokémon Showdown!.