github workflow: build_setup: employ shell script, MANIFEST.in: include .hpp from lib

.github/workflows/pypi-deploy.yml

@@ -12,10 +12,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Prepare files
-        run: |
-          cat README.md | grep '^# IMCtermite' -A 50000 > python/README.md
-          cp -r lib/ python
-          cp -v LICENSE python
+        run: python/setup.sh
 
   build_wheels:
     name: Build binary wheels on ${{ matrix.os }}