Move hotkey-notes to scripts, delete needs_porting!

The notes script is unfinished, but that's the last thing to do - since
everything else is obsolete, ported, or the subject of a github issue to
make a replacement.

needs_porting/_notes.txt

@@ -1,9 +0,0 @@
-TODO:  
-    copypaste.cpp
-        high value target - a proof of concept plugin to allow copy-pasting in DF; does both terrain and buildings/constructions
-    creaturemanager.cpp
-        modify skills and labors of creatures, kill creatures, etc; impressive but I suspect most functions implemented elsewhere
-
-In progress:
-    hotkey-notes.lua
-        prints list of hotkeys with name and jump position

scripts/hotkey-notes.lua

@@ -1,5 +1,9 @@
 -- prints info on assigned hotkeys to the console
 
+-- A work in progress, hoping for some help!
+-- A different approach might be needed depending on internal structures, 
+--    but this gets the idea across.
+
 local hotkeys = {'F1 ', 'F2 ', 'F3 ', 'F4 ', 'F5 ', 'F6 ',
                  'F7 ', 'F8 ', 'F9 ', 'F10', 'F11', 'F12'}
 
@@ -13,28 +17,4 @@ for i=1, #hotkeys do
     hk.z = df.global.window_z
 
     print(hk.id..'  '..hk.name..'    X= '..hk.x..',  Y= '..hk.y..',  Z= '..hk.z)
-end
-
---[[ 
-# the (very) old Python version...
-from context import Context, ContextManager
-
-cm = ContextManager("Memory.xml")
-df = cm.get_single_context()
-
-df.attach()
-
-gui = df.gui
-
-print "Hotkeys"
-
-hotkeys = gui.read_hotkeys()
-
-for key in hotkeys:
-    print "x: %d\ny: %d\tz: %d\ttext: %s" % (key.x, key.y, key.z, key.name)
-
-df.detach()
-
-print "Done.  Press any key to continue"
-raw_input()
-]]--
+end