turtle gps rework

core/etc/scripts/goHome

@@ -1,3 +1,7 @@
 _G.requireInjector(_ENV)
-local Home = require('turtle.home')
-turtle.run(Home.go)
+local config = require('config').load('gps')
+if config.home then
+  if turtle.enableGPS() then
+    return turtle.pathfind(config.home)
+  end
+end

core/etc/scripts/setHome

@@ -1,3 +1,8 @@
 _G.requireInjector(_ENV)
-local Home = require('turtle.home')
-turtle.run(Home.set)
+local Config = require('config')
+local pt = turtle.enableGPS()
+if pt then
+  local config = Config.load('gps', { })
+  config.home = pt
+  Config.update('gps', config)
+end