Merge branch 'work'

Lots of small fixes that have come out of trying to run the testsuite
in the aftermath of splitting of the TypeTree library.

Most of the fixes are local to the tests, but there are two external
fixes

- VectorGridFunctionSpace was broken after the recent changes to the
  way nested spaces work

- the ISTLMatrixBackend constructor that directly assigns a value didn't
  compile

* work:
  [VectorGridFunctionSpace] Fix construction sequence to avoid segfault related to now handling of function space tree
  [Whitespace] Clean up testutilities.cc
  [Whitespace] Clean up functionwrappers.hh
  [Tests] Fix test failures due to new handling of nested function spaces and orderings
  [Tests] Disable tests that have been known to fail forever because of non-ported features
  [Tests] Add missing include statements to fix some compiler errors
  [Tests] Fix warnings about moved constraints headers
  [VectorGridFunctionSpace] Reimplement name() getter to avoid visibility problem
  [ISTLMatrixBackend] Fix compilation error in constructor that assigns an initial value