Update to 1.3.26

Applied patch from https://github.com/DrKLO/Telegram/pull/99 . Thanks.
Added German localization. Thanks to all from
https://github.com/DrKLO/Telegram/pull/129
Experimental audio (will not go to market yet, we will switch to opus
codec)
Improved text drawing perfomance (now Telegram can draw even «War and
Peace» in one message)
Ability to send multiple photos and documents from external apps
Contacts fixes
Memory usage optimizations in network code (receiving data)
Partly switched to native ByteBuffers (decoding received data)
Added support of Telegram API Layer 12
Bug fixes
Adding settings options to enable some new features
Implementing Invisible Mode and its settings plus a small fix to the default setting for native emoji
Tiny updates