- added pdFinal option
    - labelled muf - grad(muf) used, so can now manipulate in fvSolution etc
    - added absolute/relative around the calculation of divU

- version is WM_PROJECT_VERSION prefix + SHA1 from current git head
- move double quotes from make rules to global.Cver for extra safety

- added wmakePrintBuild -check, -update, -version options
- only update .build cache when explictly requested and
  from within the wmake Cver rules
- use -check option to avoid unnecessary remake in src/Allwmake

- the $WM_PROJECT_DIR/.build file is automatically updated.
  This file is (and must be) ignored by git.

- This was originally plan 'B', but it is actually probably more efficient
  than using PtrDictionary anyhow.
- straightened out the return value logic, but it wasn't being used anywhere
  anyhow.
- new 'updated_' data member avoids inadvertent execution in the read()
  method when execution is turned off.

Conflicts:

	src/Allwmake
	src/OpenFOAM/global/global.C
	wmake/rules/General/version

Retained solution with global.Cver

- move url to lower right: makes version information stand out better

New fuels are iso/n-propanol and urea.  Although urea is a bit dodgy, but that's
all of the properties Ive found so far.

I've also added a variation of temperature instead of constant temperature for
some injector-classes so Im sending you the new version of the dieselFoam
tutorial also.

- PtrDictionary and remove(const word&) does not seem to work

- can return NULL pointer instead of FatalError for non-existent entries

- The new cmake seems to be even smarter. If we try to use env variables in
  the .cmake files (eg, with And's sed fixup), they are rewritten in a
  subsequent re-make and take much longer).  Adjusting the compiler values
  themselves causes a full remake. On the positive side, disabling the rpath
  seems to mean we may not need any of this.

  In summary - yuck!