lua: move Lua packages under lang/lua sub-folder

There are roughly 50 Lua packages.
It's about time we consider a proposal for moving all of them
under a lang/lua sub-folder.

Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>

lang/lua/lua-struct/Makefile

@@ -0,0 +1,42 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=lua-struct
+PKG_VERSION:=0.9.2
+PKG_RELEASE:=1
+
+PKG_VERSION_TAG:=$(PKG_VERSION)-1
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION_TAG).tar.gz
+PKG_SOURCE_URL:=https://codeload.github.com/iryont/$(PKG_NAME)/tar.gz/$(PKG_VERSION_TAG)?
+PKG_HASH:=30d4e3584e27caa504745fdf5e191f2469ae284dc51271292654856905a4603d
+
+PKG_MAINTAINER:=jasle <jasle@riseup.net>
+PKG_LICENSE:=MIT/X11
+
+PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION_TAG)
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/lua-struct
+  SUBMENU:=Lua
+  SECTION:=lang
+  CATEGORY:=Languages
+  TITLE:=Implementation of binary packing/unpacking in pure lua
+  URL:=https://github.com/iryont/lua-struct
+endef
+
+define Package/lua-struct/desription
+	lua-struct is a pure lua Implementation for packing and unpacking 
+	binary data. 
+endef
+
+define Build/Compile
+	echo "Nothing to compile, pure lua package"
+endef
+
+define Package/lua-struct/install
+	$(INSTALL_DIR) $(1)/usr/lib/lua
+	$(INSTALL_DATA) $(PKG_BUILD_DIR)/src/struct.lua $(1)/usr/lib/lua/
+endef
+
+$(eval $(call BuildPackage,lua-struct))
+