Render incoming typing notifications

We're not sending typing notification ourselves,
but at least now we can see them coming
from the good clients that do.
Internationalize incoming typing notification text
translate the typing notification to Polish
Merge pull request #1 from tsudoko/patch-1

Translate the typing notification to Polish
Specificy disconnect is temporary.

Otherwise it sounds like you get kicked off the network for good.
Merge pull request #417 from Proplex/patch-1

Specificy disconnect is temporary.
Italian translation: update
Merge pull request #419 from Ansa89/italian-translation

Italian translation: update
Merge branch 'incoming_typing_notifications' of https://github.com/albel727/uTox
Small update for the dutch translation

Forgot to remove a comment
Italian translation: update
Merge pull request #422 from Ansa89/italian-translation

Italian translation: update
Update German translation
Merge pull request #424 from sfan5/master

Update German translation
Merge pull request #420 from Impyy/dutch-update

Small update for the dutch translation
Fix missing header definitions for typing notifications
Merge pull request #425 from albel727/fix-missing-defs

Fix missing header definitions for typing notifications
Add SPTR() for referring to localized STRINGs as a whole
Stop relying on arithmetics for addfriend_status
Stop relying on arithmetics for file status notification