Merge ~afreiberger/charm-sudo-pair:copyright into charm-sudo-pair:master

[Drew Freiberger]

Add Apache-2 copyright file.

[Paul Goins (vultaire)]

LGTM

review: Approve

[Paul Goins (vultaire)]

review: Needs Fixing

[Drew Freiberger (afreiberger)]

updated dates per pauls comment

review: Approve

[Alvaro Uria (aluria)]

+1

review: Approve

diff --git a/src/copyright b/src/copyright
 new file mode 100644
index 0000000..8fc50d9
--- /dev/null
+++ b/src/copyright
@@ -0,0 +1,16 @@
+Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0
+
+Files: *
+Copyright: 2018-2020, Canonical Ltd.
+License: Apache-2.0
+ Licensed under the Apache License, Version 2.0 (the "License"); you may
+ not use this file except in compliance with the License. You may obtain
+ a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ License for the specific language governing permissions and limitations
+ under the License.