Add 'setup.py dev' alias.

Runns 'setup.py develop' and installs testing dependencies.

CHANGES.txt

@@ -4,6 +4,9 @@
 Unreleased
 ----------
 
+- Added ``setup.py dev`` alias (runs ``setup.py develop`` and installs
+  testing dependencies).
+
 - Automated building the Sphinx docs via ``tox``.
 
 - Fixed 'zconfig:' URIs under Python 2.7.  The code worked around a bug in

setup.cfg

@@ -7,3 +7,6 @@ where=zodburi
 nocapture=1
 cover-package=zodburi
 cover-erase=1
+
+[aliases]
+dev = develop easy_install zodburi[testing]

setup.py

@@ -19,6 +19,7 @@ except:
 
 requires = ['ZODB3']
 tests_require = requires + ['mock']
+testing_extras = tests_require + ['nose', 'coverage']
 
 setup(name='zodburi',
       version='1.2dev',
@@ -48,4 +49,7 @@ setup(name='zodburi',
       zconfig = zodburi.resolvers:zconfig_resolver
       memory = zodburi.resolvers:mapping_storage_resolver
       """,
+      extras_require = {
+        'testing': testing_extras,
+      },
       )