[addresses issue #731] added Kopete under 'Instant Messaging'

Also, added translation stubs for all JSON files under lang/ & a 50x50
256-color non-transparent PNG Kopete icon under lib/img/free.
Merge pull request #732 from r5d/kopete

[addresses issue #731] added Kopete under 'Instant Messaging'
update Gibberbot reference to ChatSecure
rm Surespot and TextSecure due to reliance on Google Play Services
Merge branch 'master' of github.com:nylira/prism-break
remove redphone due to reliance on proprietarty gapps (https://f-droid.org/forums/topic/textsecure/page/2/)
rm reference to redphone, textsure, surespot due to reliance on Gapps
Changed infos about gapps

I have made changes on my site. Now, there are more user-friendly informations about Gapps and easier method to remove them.
Merge pull request #733 from ciddaemon/patch-4

Changed infos about gapps
Update Russian translation and fix some typos in English.
Merge https://github.com/nylira/prism-break

Conflicts:
	lang/ru.json