- Moved expensive distance function to end candidate selection
  algorithm.
- Now using the matrix initializer without number of nonzeros saving on
  pass over all aggregates for calculating them.
- When setting up the sparsity pattern there is now need to use a set
  to prevent adding a column several times to a row as the
  CreateIterator of BCRS Matrix uses a set itself. Saved it.

[[Imported from SVN: r3340]]

[[Imported from SVN: r3339]]

[[Imported from SVN: r3338]]

[[Imported from SVN: r3337]]

[[Imported from SVN: r3336]]

[[Imported from SVN: r3335]]

[[Imported from SVN: r3334]]

      assert(globalid.id(*e) >= 0);
don't work.

[[Imported from SVN: r3333]]

[[Imported from SVN: r3332]]

[[Imported from SVN: r3331]]

[[Imported from SVN: r3330]]

[[Imported from SVN: r3329]]

[[Imported from SVN: r3328]]

[[Imported from SVN: r3327]]

[[Imported from SVN: r3326]]

[[Imported from SVN: r3325]]

returns just the lowest 32 bits

[[Imported from SVN: r3324]]

unsigned int

[[Imported from SVN: r3323]]

[[Imported from SVN: r3322]]

[[Imported from SVN: r3321]]

[[Imported from SVN: r3320]]

[[Imported from SVN: r3319]]

[[Imported from SVN: r3318]]

[[Imported from SVN: r3317]]

for the iterators.

[[Imported from SVN: r3316]]

for all geometry tpyes of all entities in this set.

[[Imported from SVN: r3315]]

[[Imported from SVN: r3314]]

also forgot to delete sichCache in Grid Desctructor.

[[Imported from SVN: r3313]]

removed deprecated index,globalIndex and subIndex methods.

[[Imported from SVN: r3312]]

[[Imported from SVN: r3311]]

[[Imported from SVN: r3310]]

via level walk.

[[Imported from SVN: r3309]]

[[Imported from SVN: r3308]]

[[Imported from SVN: r3307]]

[[Imported from SVN: r3306]]

[[Imported from SVN: r3305]]

Also fug bix in Level iterator for faces.

[[Imported from SVN: r3304]]

Now list of all vertices for elements on given level is created then used
for iteration.

[[Imported from SVN: r3303]]

[[Imported from SVN: r3302]]

[[Imported from SVN: r3301]]