fix menu separators + sys dir restructure

sys/init/6.packages.lua

@@ -0,0 +1,33 @@
+local Packages = require('packages')
+local Util     = require('util')
+
+local fs    = _G.fs
+local help  = _G.help
+local shell = _ENV.shell
+
+if not fs.exists('usr/config/packages') then
+	Packages:downloadList()
+end
+
+local appPaths = Util.split(shell.path(), '(.-):')
+local helpPaths = Util.split(help.path(), '(.-):')
+
+table.insert(helpPaths, '/sys/help')
+
+for name in pairs(Packages:installed()) do
+	local packageDir = fs.combine('packages', name)
+
+	table.insert(appPaths, 1, packageDir)
+	local apiPath = fs.combine(packageDir, 'apis')
+	if fs.exists(apiPath) then
+		fs.mount(fs.combine('sys/apis', name), 'linkfs', apiPath)
+	end
+
+	local helpPath = '/' .. fs.combine(packageDir, 'help')
+	if fs.exists(helpPath) then
+		table.insert(helpPaths, helpPath)
+	end
+end
+
+help.setPath(table.concat(helpPaths, ':'))
+shell.setPath(table.concat(appPaths, ':'))