Merge branch '2.1' into 2.2

# Conflicts:
#	gns3server/version.py
#	requirements.txt

gns3server/compute/project.py

@@ -22,13 +22,13 @@ import asyncio
 import hashlib
 
 from uuid import UUID, uuid4
+
 from .port_manager import PortManager
 from .notification_manager import NotificationManager
 from ..config import Config
 from ..utils.asyncio import wait_run_in_executor, asyncio_ensure_future
 from ..utils.path import check_path_allowed, get_default_project_directory
 
-
 import logging
 log = logging.getLogger(__name__)
 
@@ -43,7 +43,7 @@ class Project:
     :param path: path of the project. (None use the standard directory)
     """
 
-    def __init__(self, name=None, project_id=None, path=None):
+    def __init__(self, name=None, project_id=None, path=None, variables=None):
 
         self._name = name
         if project_id:
@@ -58,6 +58,7 @@ class Project:
         self._nodes = set()
         self._used_tcp_ports = set()
         self._used_udp_ports = set()
+        self._variables = variables
 
         if path is None:
             location = get_default_project_directory()
@@ -80,7 +81,8 @@ class Project:
 
         return {
             "name": self._name,
-            "project_id": self._id
+            "project_id": self._id,
+            "variables": self._variables
         }
 
     def _config(self):
@@ -128,6 +130,14 @@ class Project:
 
         return self._nodes
 
+    @property
+    def variables(self):
+        return self._variables
+
+    @variables.setter
+    def variables(self, variables):
+        self._variables = variables
+
     def record_tcp_port(self, port):
         """
         Associate a reserved TCP port number with this project.
@@ -284,6 +294,17 @@ class Project:
             yield from node.delete()
             self._nodes.remove(node)
 
+    @asyncio.coroutine
+    def update(self, variables=None, **kwargs):
+        original_variables = self.variables
+        self.variables = variables
+
+        # we need to update docker nodes when variables changes
+        if original_variables != variables:
+            for node in self.nodes:
+                if hasattr(node, 'update'):
+                    yield from node.update()
+
     @asyncio.coroutine
     def close(self):
         """