Update pip and setuptools in requirements txt

Versions selected to be pre-19 pip
due to unresolved issues with the build systems

Upgrade everything, party on

document new process

rotate license files

fix Swagger schema generation target

Remove --ignore-installed flag

docs/licenses/importlib-metadata.txt

@@ -0,0 +1,13 @@
+Copyright 2017-2019 Jason R. Coombs, Barry Warsaw
+
+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.