some minor updates

bootnode/gcloud.py

@@ -232,6 +232,9 @@ class Gcloud(object):
     def list_snapshots(self, network=None):
         """
         List all snapshots for a given network.
+
+        :param network: The name of the network
+        :return: Returns the list of snapshots, parsed into objects
         """
         snaps = [Snapshot(s, self) for s in
                  self.gce_api.snapshots().list(project=self.project).execute()['items']]
@@ -245,6 +248,9 @@ class Gcloud(object):
         """
         Create a snapshot of a given disk. Optionally label with Pod disk is
         associated.
+
+        :param network: The name of the network
+        :return: Returns the list of snapshots, parsed into objects
         """
 
         if not project:

bootnode/template.py

@@ -163,6 +163,7 @@ class Blockchain(Pod):
     def is_blockchain(cls, chain):
         return
 
+
 class Ethereum(Blockchain):
     def __init__(self, name, network='mainnet',
                  image='gcr.io/hanzo-ai/geth:latest', command='/bin/geth',
@@ -269,8 +270,13 @@ class Ethereum(Blockchain):
     def is_blockchain(cls, chain):
         return chain in ['ethereum', 'eth', 'geth']
 
+
 class Bitcoin(Blockchain):
     def __init__(self, name, network, image, command, args, path,
                  resources=None, limits=None):
         super(Bitcoin, self).__init__(name, 'bitcoin', network, image, command,
                                       args, path, resources, limits)
+
+    @classmethod
+    def is_blockchain(cls, chain):
+        return chain in ['bitcoin']