Exchange troubled cell

Some more features for LimitPass.

pydemo/euler/main.py

-import mpi4py.rc
+#import mpi4py.rc
 # mpi4py.rc.threaded = False
 from dune.fem import parameter
 from dune.femdg.testing import run
@@ -12,13 +12,14 @@ from euler import sod as problem
 dim = 2
 gamma = 1.4
 
-parameter.append({"fem.verboserank": -1})
+parameter.append({"fem.verboserank": 0})
 
 primitive=lambda Model,uh: {"pressure": Model.toPrim(uh)[2]}
 parameters = {"fem.ode.odesolver": "EX",
               "fem.timeprovider.factor": 0.25,
               "fem.ode.order": 3,
               "femdg.limiter.admissiblefunctions": 1,
+              "femdg.limiter.indicator": 1,
               "femdg.limiter.tolerance": 1,
               "femdg.limiter.epsilon": 1e-8}
 #-----------------