Clean up and complete RTD documentation

readthedocs/extra/developing/telegram-api-in-other-languages.rst

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+===============================
+Telegram API in Other Languages
+===============================
+
+
+Telethon was made for **Python**, and as far as I know, there is no
+*exact* port to other languages. However, there *are* other
+implementations made by awesome people (one needs to be awesome to
+understand the official Telegram documentation) on several languages
+(even more Python too), listed below:
+
+C
+*
+
+Possibly the most well-known unofficial open source implementation out
+there by `**@vysheng** <https://github.com/vysheng>`__,
+```tgl`` <https://github.com/vysheng/tgl>`__, and its console client
+```telegram-cli`` <https://github.com/vysheng/tg>`__. Latest development
+has been moved to `BitBucket <https://bitbucket.org/vysheng/tdcli>`__.
+
+JavaScript
+**********
+
+`**@zerobias** <https://github.com/zerobias>`__ is working on
+```telegram-mtproto`` <https://github.com/zerobias/telegram-mtproto>`__,
+a work-in-progress JavaScript library installable via
+```npm`` <https://www.npmjs.com/>`__.
+
+Kotlin
+******
+
+`Kotlogram <https://github.com/badoualy/kotlogram>`__ is a Telegram
+implementation written in Kotlin (the now
+`official <https://blog.jetbrains.com/kotlin/2017/05/kotlin-on-android-now-official/>`__
+language for
+`Android <https://developer.android.com/kotlin/index.html>`__) by
+`**@badoualy** <https://github.com/badoualy>`__, currently as a beta–
+yet working.
+
+PHP
+***
+
+A PHP implementation is also available thanks to
+`**@danog** <https://github.com/danog>`__ and his
+`MadelineProto <https://github.com/danog/MadelineProto>`__ project, with
+a very nice `online
+documentation <https://daniil.it/MadelineProto/API_docs/>`__ too.
+
+Python
+******
+
+A fairly new (as of the end of 2017) Telegram library written from the
+ground up in Python by
+`**@delivrance** <https://github.com/delivrance>`__ and his
+`Pyrogram <https://github.com/pyrogram/pyrogram>`__ library! No hard
+feelings Dan and good luck dealing with some of your users ;)
+
+Rust
+****
+
+Yet another work-in-progress implementation, this time for Rust thanks
+to `**@JuanPotato** <https://github.com/JuanPotato>`__ under the fancy
+name of `Vail <https://github.com/JuanPotato/Vail>`__. This one is very
+early still, but progress is being made at a steady rate.