Move to Lua 5.3.

Also new shell script to install Luarocks (for Lua5.3) (on Ubuntu 16.04) and all
necessary rocks.
Updated tg-install.sh to not include all the needless dependencies.

otouto/plugins/administration.lua

@@ -1066,7 +1066,7 @@ function administration.init_command(self_, config_)
 
             command = 'alist',
             privilege = 3,
-            interior = true,
+            interior = false,
             doc = 'Returns a list of administrators. Owner is denoted with a star character.',
 
             action = function(self, msg, group, config)

otouto/plugins/luarun.lua

@@ -36,7 +36,7 @@ function luarun:action(msg, config)
     end
 
     local output, success =
-        loadstring("local bot = require('otouto.bot')\n\z
+        load("local bot = require('otouto.bot')\n\z
         local bindings = require('otouto.bindings')\n\z
         local utilities = require('otouto.utilities')\n\z
         local drua = require('otouto.drua-tg')\n\z