Start cloud langpack support.

Change the way langpacks are stored.
Support custom langpacks in the new storage.

Telegram/SourceFiles/settings.cpp

@@ -42,8 +42,6 @@ QString gWorkingDir, gExeDir, gExeName;
 QStringList gSendPaths;
 QString gStartUrl;
 
-QString gLangErrors;
-
 QString gDialogLastPath, gDialogHelperPath; // optimize QFileDialog
 
 bool gStartMinimized = false;