Add Process and Signals support

Signed-off-by: Jan Lindemann <jan@janware.com>

tools/python/jwutils/asyncio/Signals.py

@@ -0,0 +1,10 @@
+import asyncio
+from ..Signals import Signals as SignalsBase
+
+class Signals(SignalsBase):
+
+    # reimplemented from Signals
+    @classmethod
+    def _add_handler(cls, signal, handler):
+        loop = asyncio.get_running_loop()
+        loop.add_signal_handler(signal, handler, None) # None = *args