Fully documented ctr and ctr.gfx in the C source

The documentation can be built using LDoc : run make build-doc

However, there's still a bunch of things to document.

doc/config.ld

@@ -0,0 +1,26 @@
+-- General options
+title = "ctrµLua documentation"
+project = "ctrµLua"
+description = "ctrµLua: Lua homebrewing for 3DS"
+not_luadoc = true
+
+-- Generation options
+dir = "./html/"
+style = "!fixed"
+format = "markdown"
+plain = true
+
+-- Input files
+topics = "../README.md"
+file = "../source/"
+examples = "../sdcard/3ds/ctruLua/examples/"
+manual_url = "file://../libs/lua-5.3.1/doc/manual.html"
+
+-- Custom tags
+custom_tags = { { "newonly", hidden = true } }
+custom_display_name_handler = function(item, default_handler)
+	if item.tags.newonly then
+		return default_handler(item).." <sup><img src=../../newonly.png alt='(N3DS only)'></sup>"
+	end
+	return default_handler(item)
+end