Add the packaging metadata to build the ia snap

snap/snapcraft.yaml

@@ -0,0 +1,19 @@
+name: ia
+version: master
+summary: A Command-Line Interface to Archive.org
+description: |
+  This package installs a command-line tool named ia for using Archive.org
+  from the command-line.
+
+grade: devel # must be 'stable' to release into candidate/stable channels
+confinement: strict
+
+apps:
+  ia:
+    command: ia
+    plugs: [network, home, removable-media]
+
+parts:
+  internetarchive:
+    source: .
+    plugin: python