Remove promote script from editor/build and put it under tools (where it really belongs)

tools/promote.py

Index: tools/promote.py
diff --git a/editor/build/promote.py b/tools/promote.py
similarity index 96%
rename from editor/build/promote.py
rename to tools/promote.py
index 366e1b90a5a7af0579cbbbb42b148b954ebbd225..b17dd5e5d59835505ac6663d1a65bb26482265fe 100644
--- a/editor/build/promote.py
+++ b/tools/promote.py
@@ -13,14 +13,11 @@ import subprocess
 import sys
 import time
 import urllib
+import bots.bot_utils as bot_utils
 
 from os.path import join
 
-DART_PATH = os.path.abspath(os.path.join(__file__, '..', '..', '..'))
-BOT_UTILS = os.path.abspath(os.path.join(
-    DART_PATH,  'tools', 'bots', 'bot_utils.py'))
-
-bot_utils = imp.load_source('bot_utils', BOT_UTILS)
+DART_PATH = os.path.abspath(os.path.join(__file__, '..', '..'))
 
 def BuildOptions():
   usage = """usage: %prog promote [options]