Multi-protocol

Lots of chagnes to add multi protocol flexibility, not really
completed yet, still have to rework text messages opcodes and other stuff,
so this still a working in progress feature

* Rework dat reader, the dat reader can now
* dinamically detect dat version
* Split game into gamelib and game_interface
* Lots of other minor changes

modules/gamelib/game.lua

@@ -0,0 +1,47 @@
+local currentRsa = OTSERV_RSA
+
+function g_game.getRsa()
+  return currentRsa
+end
+
+function g_game.chooseRsa(host)
+  if host:match('.*\.tibia\.com') or host:match('.*\.cipsoft\.com') then
+    currentRsa = CIPSOFT_RSA
+  else
+    currentRsa = OTSERV_RSA
+  end
+end
+
+function g_game.setRsa(rsa)
+  currentRsa = rsa
+end
+
+function g_game.isOfficialTibia()
+  return currentRsa == CIPSOFT_RSA
+end
+
+function g_game.getOsType()
+  if g_game.isOfficialTibia() then
+    if g_app.getOs() == 'windows' then
+      return OsTypes.Windows
+    else
+      return OsTypes.Linux
+    end
+  else
+    if g_app.getOs() == 'windows' then
+      return OsTypes.OtclientWindows
+    elseif g_app.getOs() == 'mac' then
+      return OsTypes.OtclientMac
+    else
+      return OsTypes.OtclientLinux
+    end
+  end
+end
+
+function g_game.getSupportedProtocols()
+  return {
+    810, 853, 854, 860, 861, 862, 870, 940,
+    953, 954, 960
+  }
+end
+