DeviceManager: Introduced DeviceManager extension

DeviceManagers will replace devices and will wrap devlib targets for use in WA

setup.py

@@ -76,7 +76,8 @@ params = dict(
         'pyserial',  # Serial port interface
         'colorama',  # Printing with colors
         'pyYAML',  # YAML-formatted agenda parsing
-        'requests', # Fetch assets over HTTP
+        'requests',  # Fetch assets over HTTP
+        'devlib',  # Interacting with devices
     ],
     extras_require={
         'other': ['jinja2', 'pandas>=0.13.1'],