Moved library path modifications to main.lua, made all paths relative

The library path can now be easlily modified.

Instead of always launching /3ds/ctruLua/main.lua, ctruLua will now launch the main.lua in the current directory (the ctruLua.3dsx directory when launched with HBL).

On citra, this will be the root of the sdmc directory.

sdcard/3ds/ctruLua/editor/main.lua

@@ -3,8 +3,8 @@ local hid = require("ctr.hid")
 local gfx = require("ctr.gfx")
 
 -- Open libs
-local keyboard = dofile("sdmc:/3ds/ctruLua/keyboard.lua")
-local openfile = dofile("sdmc:/3ds/ctruLua/openfile.lua")
+local keyboard = require("keyboard")
+local openfile = require("openfile")
 local color = dofile("color.lua")
 local syntax = dofile("syntax.lua")
 
@@ -12,7 +12,7 @@ local syntax = dofile("syntax.lua")
 local font = gfx.font.load("VeraMono.ttf")
 
 -- Open file
-local path, status = openfile("Choose a file to edit", "/3ds/ctruLua/", nil, "any")
+local path, status = openfile("Choose a file to edit", nil, nil, "any")
 if not path then return end
 local lineEnding
 local lines = {}

sdcard/3ds/ctruLua/main.lua

@@ -1,8 +1,11 @@
 local fs = require("ctr.fs")
 
+-- Set up path
+local ldir = fs.getDirectory().."libs/"
+package.path = package.path..";".. ldir.."?.lua;".. ldir.."?/init.lua"
+
 repeat
-	fs.setDirectory("sdmc:/3ds/ctruLua")
-	local file = dofile("openfile.lua")("Choose a Lua file to execute", "/3ds/ctruLua/", ".lua", "exist")
+	local file = require("openfile")("Choose a Lua file to execute", nil, ".lua", "exist")
 	if file then
 		fs.setDirectory(file:match("^(.-)[^/]*$"))
 		dofile(file)

sdcard/3ds/ctruLua/openfile.lua

@@ -1,6 +1,6 @@
 --- Open a file explorer to select a file.
 -- string title: title of the file explorer.
--- string curdir: the directory to initially open the file explorer in.
+-- string curdir: the directory to initially open the file explorer in, or nil for the current directory.
 -- string exts: the file extensions the user can select, separated by ";". If nil, all extensions are accepted.
 -- string type: "exist" to select an existing file, "new" to select an non-existing file or "any" to select a existing
 --              or non-existing file name. If nil, defaults to "exist".
@@ -11,9 +11,10 @@ return function(title, curdir, exts, type)
 	local ctr = require("ctr")
 	local gfx = require("ctr.gfx")
 	
-	local keyboard = dofile("sdmc:/3ds/ctruLua/keyboard.lua")
+	local keyboard = require("keyboard")
 	
 	-- Arguments
+	local curdir = curdir or ctr.fs.getDirectory()
 	local type = type or "exist"
 	
 	-- Variables