Move geometry devices, some utilities to own repositories

tests/problem.py

-from calng import utils
-
-
-calls = 0
-
-
-@utils.threadsafe_cache
-def will_raise_once(argument):
-    global calls
-    calls += 1
-    if calls == 1:
-        raise Exception("That's just what I do")
-    return argument + 1
-
-
-try:
-    will_raise_once(0)
-except Exception as ex:
-    print("As expected, firs call raised:", ex)
-
-print("Now calling again:")
-print(will_raise_once(0))