Scripting WIP (#70)

* Scripting introduced

* AppImage workflow fixes

* AppImage workflow simplified

* README.md update

* README.md update

* small fix

src/logic/scripting/api_lua.h

@@ -0,0 +1,14 @@
+#ifndef LOGIC_SCRIPTING_API_LUA_H_
+#define LOGIC_SCRIPTING_API_LUA_H_
+
+#include <lua.hpp>
+
+#ifndef LUAJIT_VERSION
+#pragma message("better use LuaJIT instead of plain Lua")
+#endif // LUAJIT_VERSION
+
+namespace apilua {
+    extern void create_funcs(lua_State* L);
+}
+
+#endif // LOGIC_SCRIPTING_API_LUA_H_