* DynList construction with integer parameter:

    DynList<T>(int32_t) - eg DynList<T> lst(10)

  Candidates are

     DynList(const label)
     template<class ListType> DynList(const ListType& lst)

  It picks the second as the beter match (error).

  Resolve by adding DynList(int32_t) constructor for label-size=64

* Similar problem with copy assignment.
     dyList = -1 (for example) picks
     template<class ListType> operator=(const ListType& lst)

  Resolve by replacing general list assignment with assignments for
  DynList, UList, FixedList

Namespace and tutorial adjustments

See merge request !2

Integration update methods

See merge request !1

The tutorials cartesianMesh/bunnyOctree, cartesianMesh/sBendOctree
do not run through very smoothly, so tagged as 'Optional' for now

- avoids potential collisions and allows easier migration of classes
  into OpenFOAM itself

- use fully-qualified names in implementation

- the previous code used a dual-purposed graphRow for non-const/const
  access. However, clang 4.0 rightly identifies there being no
  constructor path from "graphRow<T>" to a "graphRow<const T>".

  Since the row-access is a somewhat similar concept to an STL-iterator,
  now provide non-const and const versions of the row access.

- use range-for when iterating over HashSet

- prefer forAllIters(), forAllConstIters() with automatic decltype

    containsAtPosition   -> find
    contains             -> found

    lastElement          -> last
    removeLastElement    -> remove()
    removeElement(int)   -> [TODO]  remove(int, bool)

    fcElement -> fcValue
    rcElement -> rcValue

- Eg, readIfPresent() instead of found() followed by lookup()

- use FUNCTION_NAME for IO checks

https://sourceforge.net/p/cfmesh/code/merge-requests/2/

unallocatedLabelList is not available as a typedef in OpenFOAM-dev, and UList<Type> is available everywhere

Using UPstream::commsTypes::blocking everywhere.This should work on other versions besides -dev.