add explicits imports on release tools

tools/build_release

@@ -5,7 +5,7 b''
 import os
 from shutil import rmtree
 
-from toollib import *
+from toollib import sh, pjoin, get_ipdir, cd, compile_tree, execfile, sdists, wheels
 
 # Get main ipython dir, this will raise if it doesn't pass some checks
 ipdir = get_ipdir()

tools/release

@@ -5,7 +5,11 b' This should ONLY be run at real release time.'
 """
 from __future__ import print_function
 
-from toollib import *
+import os
+import sys
+
+from toollib import (get_ipdir, pjoin, cd, execfile, version, sh, archive,
+        sdists, archive_user, archive_dir)
 from gh_api import post_download
 
 # Get main ipython dir, this will raise if it doesn't pass some checks