Move the Editor configuration out of Manifest's constructor

This way we can build more than one Manifest instance in memory
and not muck around with the Editor configuration each time we
build a new instance.

Signed-off-by: Shawn O. Pearce <sop@google.com>

main.py

@@ -28,6 +28,7 @@ import re
 import sys
 
 from command import InteractiveCommand, PagedCommand
+from editor import Editor
 from error import NoSuchProjectError
 from error import RepoChangedException
 from manifest import Manifest
@@ -77,6 +78,7 @@ class _Repo(object):
 
     cmd.repodir = self.repodir
     cmd.manifest = Manifest(cmd.repodir)
+    Editor.globalConfig = cmd.manifest.globalConfig
 
     if not gopts.no_pager and not isinstance(cmd, InteractiveCommand):
       config = cmd.manifest.globalConfig

manifest.py

@@ -17,7 +17,6 @@ import os
 import sys
 import xml.dom.minidom
 
-from editor import Editor
 from git_config import GitConfig, IsId
 from import_tar import ImportTar
 from import_zip import ImportZip
@@ -42,9 +41,7 @@ class Manifest(object):
     self.repodir = os.path.abspath(repodir)
     self.topdir = os.path.dirname(self.repodir)
     self.manifestFile = os.path.join(self.repodir, MANIFEST_FILE_NAME)
-
     self.globalConfig = GitConfig.ForUser()
-    Editor.globalConfig = self.globalConfig
 
     self.repoProject = MetaProject(self, 'repo',
       gitdir   = os.path.join(repodir, 'repo/.git'),