add readthedocs install hack

Author: RonnyPfannschmidt

setup.py

@@ -0,0 +1,15 @@
+import argparse
+import sys
+import subprocess
+import os
+
+parser = argparse.ArgumentParser(description="hack to let readthedoc install work")
+parser.add_argument("action", choices=["install"])
+
+if __name__ == "__main__":
+    parser.parse_args()
+    sys.exit(
+        subprocess.call(
+            [sys.executable, "-m", "pip", "install", "-e", os.path.dirname(__file__)]
+        )
+    )