Finish merging @benoitbryon's pypa#1946 with develop

Author: msabramo

pip/commands/freeze.py

@@ -61,6 +61,8 @@ def __init__(self, *args, **kw):
 
     def run(self, options, args):
         freeze_kwargs = dict(
+            only_dists=args,
+            recursive=options.recursive,
             requirement=options.requirement,
             find_links=options.find_links,
             local_only=options.local,

pip/operations/freeze.py

@@ -6,7 +6,7 @@
 import pip
 from pip.compat import stdlib_pkgs
 from pip.req import InstallRequirement
-from pip.utils import get_installed_distributions
+from pip.utils import get_installed_distributions, get_recursive_dependencies
 from pip._vendor import pkg_resources
 
 
@@ -18,6 +18,7 @@
 
 def freeze(
         only_dists=None,
+        recursive=False,
         requirement=None,
         find_links=None, local_only=None, user_only=None, skip_regex=None,
         find_tags=False,