Add kwargs to upper level download methods (#30)

This adds kwargs to both `transactioninfo()` and `cloudevent()`
methods in the upper level `Downloader` class. The filename is
moved to a kwargs and an optional timeout argument is also added.

Fix #24

Signed-off-by: David Brown <dmlb2000@gmail.com>

pacifica/downloader/downloader.py

@@ -40,7 +40,7 @@ def _download_from_url(self, location, cart_url, filename):
         cart_tar.extractall(location)
         cart_tar.close()
 
-    def transactioninfo(self, location, transinfo, filename='data'):
+    def transactioninfo(self, location, transinfo, **kwargs):
         """
         Handle transaction info and download the data in a cart.
 
@@ -52,12 +52,13 @@ def transactioninfo(self, location, transinfo, filename='data'):
             self.cart_api.wait_for_cart(
                 self.cart_api.setup_cart(
                     TransactionInfo.yield_files(transinfo)
-                )
+                ),
+                int(kwargs.get('timeout', 120))
             ),
-            filename
+            kwargs.get('filename', 'data')
         )
 
-    def cloudevent(self, location, cloudevent, filename='data'):
+    def cloudevent(self, location, cloudevent, **kwargs):
         """
         Handle a cloud event and download the data in a cart.
 
@@ -73,7 +74,8 @@ def cloudevent(self, location, cloudevent, filename='data'):
             self.cart_api.wait_for_cart(
                 self.cart_api.setup_cart(
                     CloudEvent.yield_files(cloudevent)
-                )
+                ),
+                int(kwargs.get('timeout', 120))
             ),
-            filename
+            kwargs.get('filename', 'data')
         )