Moved imports to avoid circular import.

src/zc/buildout/easy_install.py

@@ -18,9 +18,6 @@ It doesn't install scripts.  It uses setuptools and requires it to be
 installed.
 """
 
-from zc.buildout.networkcache import get_filename_from_url, \
-                                     upload_network_cached, \
-                                     download_network_cached
 import distutils.errors
 import fnmatch
 import glob
@@ -44,6 +41,12 @@ _oprp = getattr(os.path, 'realpath', lambda path: path)
 def realpath(path):
     return os.path.normcase(os.path.abspath(_oprp(path)))
 
+
+from zc.buildout.networkcache import get_filename_from_url, \
+                                     upload_network_cached, \
+                                     download_network_cached
+
+
 default_index_url = os.environ.get(
     'buildout-testing-index-url',
     'http://pypi.python.org/simple',

src/zc/buildout/networkcache.py

@@ -19,7 +19,6 @@ import posixpath
 import re
 import urllib
 import urlparse
-from download import check_md5sum
 from slapos.libnetworkcache import NetworkcacheClient, UploadError, \
                                    DirectoryNotFound
 
@@ -126,3 +125,6 @@ def get_filename_from_url(url):
     assert name, (
            'URL %r produced no filename' % url)
     return name
+
+
+from download import check_md5sum