- markup codingStyleGuide.org examples so they actually indent correctly

- use 'Info<<' as per codingStyleGuide instead of 'Info <<'

- use first() method in some places as well where it helps clarity

- there are a few remaining cases: git grep 'size()-1]'

This currently only runs in serial, parallelisation is worked on.

- in preparation for adding an optional '-reconstruct' to a few utilities
  re-use as -lreconstruct library

- move related stuff there too
      src/decompositionMethods/decompositionMethods
      -> src/parallel/decompositionMethods

- added missing namespace qualifiers

http://www.cfd-online.com/Forums/openfoam-bugs/70259-vtkfoam-c-calls-call-non-existing-volpointinterpolate-ct
or.html

with the boundary motion before the fluxes are corrected for continuity by
pcorr.

Francesco Del Citto.

- iterators store pointers instead of references to the HashTbl.
  This lets us use the default bitwise copy/assignment

- add empty constructor for iterators. It returns the equivalent to end().
  This lets us do this:
      HashTbl<label>::iterator iter;
      // some time later
      iter = find(Value);

- erase(const HashTbl<AnyType, Key, AnyHash>&) is now more generous.
  Only the Key type matters, not the hashing function.

- for the hashTableTest3, it seemed to slow things down a bit

loop 0 - Erased 100000 elements (size 2900000 capacity 4194304) 0.31 s
loop 1 - Erased 100000 elements (size 2800000 capacity 4194304) 0.01 s
loop 2 - Erased 100000 elements (size 2700000 capacity 4194304) 0 s
loop 3 - Erased 100000 elements (size 2600000 capacity 4194304) 0 s
loop 4 - Erased 100000 elements (size 2500000 capacity 4194304) 0.01 s
loop 5 - Erased 100000 elements (size 2400000 capacity 4194304) 0 s
loop 6 - Erased 100000 elements (size 2300000 capacity 4194304) 0 s
loop 7 - Erased 100000 elements (size 2200000 capacity 4194304) 0 s
loop 8 - Erased 100000 elements (size 2100000 capacity 4194304) 0.01 s
loop 9 - Erased 100000 elements (size 2000000 capacity 4194304) 0.44 s
loop 10 - Erased 100000 elements (size 1900000 capacity 4194304) 0.44 s
loop 11 - Erased 100000 elements (size 1800000 capacity 4194304) 0.39 s
loop 12 - Erased 100000 elements (size 1700000 capacity 4194304) 0.4 s
loop 13 - Erased 100000 elements (size 1600000 capacity 2097152) 0.15 s
loop 14 - Erased 100000 elements (size 1500000 capacity 2097152) 0.01 s
loop 15 - Erased 100000 elements (size 1400000 capacity 2097152) 0 s
loop 16 - Erased 100000 elements (size 1300000 capacity 2097152) 0 s
loop 17 - Erased 100000 elements (size 1200000 capacity 2097152) 0.01 s
loop 18 - Erased 100000 elements (size 1100000 capacity 2097152) 0 s
loop 19 - Erased 100000 elements (size 1000000 capacity 2097152) 0.27 s
loop 20 - Erased 100000 elements (size 900000 capacity 2097152) 0.2 s
loop 21 - Erased 100000 elements (size 800000 capacity 1048576) 0.1 s
loop 22 - Erased 100000 elements (size 700000 capacity 1048576) 0 s
loop 23 - Erased 100000 elements (size 600000 capacity 1048576) 0 s
loop 24 - Erased 100000 elements (size 500000 capacity 1048576) 0.12 s
loop 25 - Erased 100000 elements (size 400000 capacity 524288) 0.04 s
loop 26 - Erased 100000 elements (size 300000 capacity 524288) 0.01 s
loop 27 - Erased 100000 elements (size 200000 capacity 262144) 0.02 s
loop 28 - Erased 100000 elements (size 100000 capacity 131072) 0.02 s
loop 29 - Erased 100000 elements (size 0 capacity 2) 0 s

- The ideas as discussed in email

- The speedup is really there.

Before
loop 0 - Erased 100000 elements:   3.82 s
loop 1 - Erased 100000 elements:   11.45 s
loop 2 - Erased 100000 elements:   19.46 s
loop 3 - Erased 100000 elements:   27.73 s
loop 4 - Erased 100000 elements:   38.74 s
^C

After
loop 0 - Erased 100000 elements (size 2900000 capacity 8388608) 0.01 s
loop 1 - Erased 100000 elements (size 2800000 capacity 8388608) 0 s
loop 2 - Erased 100000 elements (size 2700000 capacity 8388608) 0.01 s
loop 3 - Erased 100000 elements (size 2600000 capacity 8388608) 0 s
loop 4 - Erased 100000 elements (size 2500000 capacity 8388608) 0 s
loop 5 - Erased 100000 elements (size 2400000 capacity 8388608) 0 s
loop 6 - Erased 100000 elements (size 2300000 capacity 8388608) 0 s
loop 7 - Erased 100000 elements (size 2200000 capacity 8388608) 0 s
...

- rename to HashTable later when it is considered stable