Add dev environment setup

setup.py

@@ -7,11 +7,30 @@ setup(
     author_email='t.wilson@distreon.com.au',
     packages=['shepherd', ],
     install_requires=[
-          'toml',
+        "preserve@git+https://git.distreon.net/novirium/python-preserve.git",
-          'apscheduler',
+        "config-spec@git+https://git.distreon.net/novirium/config-spec.git",
-          'paramiko',
+        'toml',
-          'click'
+        'requests',
-      ],
+        'apscheduler',
+        'paramiko',
+        'click'
+    ],
+    extras_require={
+        'dev': [
+            'autopep8',
+            'pylint',
+            'pytest',
+            'pytest-flake8',
+            'pytest-cov',
+            'pytest-sugar',
+            'tox'
+        ],
+        'test': [
+            'pytest',
+            'pytest-flake8'
+        ]
+    },
+
     entry_points={
         'console_scripts': ['shepherd=shepherd.core:cli'],
     },