Move the loopy specifics to a separate subpackage

python/dune/perftool/pdelab/localoperator.py

@@ -85,7 +85,7 @@ def generate_term(integrand=None, measure=None):
     # Extract the information, which is needed to create a loopy kernel.
     # First extracting it, might be useful to alter it before kernel generation.
     from dune.perftool.generation import retrieve_cache_items
-    from dune.perftool.target import DuneTarget
+    from dune.perftool.loopy.target import DuneTarget
     domains = [i for i in retrieve_cache_items("domain")]
     instructions = [i for i in retrieve_cache_items("instruction")]
     temporaries = {i.name:i for i in retrieve_cache_items("temporary")}