- resize with factor 2 as per DynamicList

Old insertion speed:
    1000000 in 0.61 s
    2000000 in 2.24 s
    3000000 in 3.97 s
    4000000 in 5.76 s
    5000000 in 7.54 s
    6000000 in 9.41 s
    7000000 in 11.5 s

New insertion speed:
    1000000 in 0.01 s
    2000000 in 0.02 s
    3000000 in 0.01 s
    4000000 in 0.02 s
    5000000 in 0.01 s
    6000000 in 0.01 s
    7000000 in 0.01 s

allow switch/bool values for writeCompression in system/controlDict

- eg,
    writeCompression false; or writeCompression uncompressed;
    writeCompression true;  or writeCompression compressed;

improves consistency with other controlDict parameters

- compatibility:
  * 'polySpline' and 'simpleSpline' accepted
  * detect and discard end tangent specifications

- a BSpline is also included (eg, for future support of NURBS), but is
  not selectable from blockMesh since it really isn't as nice as the
  Catmull-Rom (ie, doesn't *exactly* go through each point).

triangle, from:

http://en.wikipedia.org/wiki/Inertia_tensor_of_triangle

Adding the ability to calculate the inertia tensor of a polygon face
by summing the triangle inertias.

Added a test application to draw a test face with its principal
axes and moments of inertia.

- also looks reasonable and doesn't deviate much from Catmull-Rom

- the current B-Splines deliver rubbish

- now that I re-examined the code, the note in commit 51fd6327
  can be mostly ignored

  PackedList isMaster(nPoints, 1u);
  is not really inefficient at all, since the '1u' is packed into
  32/64-bits before the subsequent assignment and doesn't involve
  shifts/masking for each index

  The same misinformation applies to the PackedList(size, 0u) form.
  It isn't much slower at all.

  Nonetheless, add bool specialization so that it is a simple assign.

- to match coding guidelines

- ensure that the standard options (eg, from timeSelector) also have
  some usage information

- bugfix: noParallel() didn't remove 'parallel' from validParOptions
  allowing it to sneak through to the Pstream layer.
  noParallel() now clears the entire validParOptions as well

- new convenience methods
  * addOption()
  * removeOption()
  * addBoolOption() - as per addOption(), but for bool options (no param)

- printUsage() output format
  * options sorted alphabetically
  * options listed on separate lines for better readability

- new optionUsage static member for short usage information about
  an option
  * corresponding addUsage() method or provide usage information
    in addOption() / addBoolOption()