[common.timedlogging] whitespace
[common.print] improved printing of trivial data structures

E.g. print 1 instead of [1] for scalar vectors, [1 2] instead of [[1 2]]
for matrices with only one row...
[common.memory] added access(), shorthand for storage_access()

storage_access() should be deprecated at some point...
[test.main] allow to toggle logging and timedlogging independently
Merge branch 'master' of https://github.com/tobiasleibner/DUNE-Stuff