Add attachment http writer

cic/cmd/export.py

@@ -12,7 +12,7 @@ from cic import (
         Proof,
         Processor,
         )
-from cic.proof import ProofWriter
+from cic.output import HTTPWriter
 from cic.meta import (
         Meta,
         MetadataWriter,
@@ -66,7 +66,8 @@ def execute(config, eargs):
         MetadataSigner.gpg_path = os.path.join('/tmp')
         MetadataSigner.key_file_path = '/home/lash/src/client/cic/grassrootseconomics/cic-internal-integration/apps/cic-ussd/tests/data/pgp/privatekeys_meta.asc'
         MetadataSigner.gpg_passphrase = 'merman'
-        writers['proof'] = ProofWriter
+        writers['proof'] = HTTPWriter
+        writers['attachment'] = HTTPWriter
         writers['meta'] = MetadataWriter
         output_writer_path_meta = eargs.metadata_endpoint