Implement Tox-STS

[KoKuToru]

https://github.com/Tox/Tox-STS/blob/master/STS.md
https://github.com/irungentoo/Tox_Client_Guidelines

I think it would be a good idea..

• The Tox ID
• Friend Requests (because it's not possible yet.. without alias, and message is required)
• Friends List
• Group Messaging
• Audio/Video chat support #122 Multimedia messaging
• Emoticons (Unicode Emojis are supported, thanks GTK)
• Message splitting
• Encodings
• Tox data directory #97 Tox data directory
• Logging (why it is called Logging ?)
• User Profile Encryption
• NoSpam Changing
• User profiles (see also Tox data directory, it looks like uTox doesn't call its files '.tox' ...)
• Multiple Account #26 Profile management
• Recommendations regarding profile management
• Avatar support #27 Avatars
• Tox URI scheme #93 Tox URI scheme
• DNS Discovery
• Translation of STS Terminology

We should create a issue for each of these items and reference them..

[KoKuToru]

STS is dead ? the most important things are already implemented

[quininer]

https://github.com/Tox/Tox-Client-Standard

This seems to be an alternative STS.
and I think it is very important to the group chat.