Add Telegram Desktop 2.1.6 (#363)

* Add Telegram Desktop 2.1.6

* Fix directory name.

* Rename to match with similar manifests.

manifests/Telegram/TelegramDesktop/2.1.6.yaml

@@ -0,0 +1,18 @@
+Id: Telegram.TelegramDesktop
+Version: 2.1.6
+Name: Telegram Desktop
+Publisher: Telegram Messenger Inc.
+License: GNU General Public License version 3
+LicenseUrl: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
+AppMoniker: telegram
+Tags: telegram, messenger
+Description: Telegram is a cloud-based mobile and desktop messaging app with a focus on security and speed. 
+Homepage: https://desktop.telegram.org
+Installers:
+  - Arch: x86
+    Url: https://updates.tdesktop.com/tsetup/tsetup.2.1.6.exe
+    Sha256: 94E6751AA8D2ED1FC582B0AEA69983501F4434D3341DD74C3BEE8D55A1A175B7
+    InstallerType: exe
+    Switches:
+      Silent: /VERYSILENT
+      SilentWithProgress: /VERYSILENT