Add 'Community creation' warning

[nekromant]

I have made a few mini bles for me and friends based on the available specs. As @limpkin suggested I used serial numbers >= 100000 for them. To avoid any frustration (in case any of the devices end up on ebay), I suggest treating any devices with serial number >=100000 as 'community creations'. For them:

• Security challenge is disabled to avoid any irrelevant spam to the (unexpecting) original team,
• A warning is printed that the device is not affiliated with the original team.

The translation files are updated yet again, I've added relevant Russian translation for the new messages and (hopefully) not too ugly German one. (The latter one needs some checking by some native speaker though, my knowledge of German is pretty bad).

[limpkin]

thanks a lot @nekromant !!! It's really appreciated.

[nekromant]

Obligatory screenshot of how it looks like with a homebrew device:

[limpkin]

@deXol could you review this one? :)