Minor changes to manifest format

LaunchInstall.lua

@@ -10,12 +10,14 @@ local basicFiles = { "Launch.lua", "Update.lua" }
 local xml = require("xml")
 local curl = require("lcurl")
 
-local localSource
+local localBranch, localSource
 local localManXML = xml.LoadXMLFile("manifest.xml")
 if localManXML and localManXML[1].elem == "PoBVersion" then
 	for _, node in ipairs(localManXML[1]) do
 		if type(node) == "table" then
-			if node.elem == "Source" then
+			if node.elem == "Version" then
+				localBranch = node.attrib.branch
+			elseif node.elem == "Source" then
 				if node.attrib.part == "program" then
 					localSource = node.attrib.url
 				end
@@ -23,10 +25,11 @@ if localManXML and localManXML[1].elem == "PoBVersion" then
 		end
 	end
 end
-if not localSource then
+if not localBranch or not localSource then
 	Exit("Install failed. (Missing or invalid manifest)")
 	return
 end
+localSource = localSource:gsub("{branch}", localBranch)
 for _, name in pairs(basicFiles) do
 	local outFile = io.open(name, "wb")
 	local easy = curl.easy()