cached_softhyphen and defaulting to language = active translation

Hi!

At first, thanks for sharing this great app!
I added a template filter "cached_softhyphen".
It makes the template filter more useable or at least a more considerable choice in production for cases where saving to the database is not an option. For example if you don´t want to fork an App.
I also made the language param default to the active language.

Maybe you like it :)

Cheers,

Lenz