Converting fat TABs to 2-space TABs
Made a few simple changes that sped this up significantly

* Converted a range into a domain to avoid creating anonymous domains
  all the time.

* Improved the triangular iteration pattern to avoid zippered
  iteration, use a ref var, and avoid array slicing.
Convert fat TABs to 2-space TABs
Reformatting nbody variations

Reducing indentations to 2-space-based.
Removing TABs from some declarations of the bodies
Removing blank lines from others
Applying similar formatting to this as the others

SOmehow I missed it on the first pass.
Further edits to nbody tests

* changed 'do {' to simply '{'

* propagated fixes that I made to nbody_iterator_7.chpl to the
  others that are timing out in memleaks testing.
Merge pull request #709 from bradcray/nbody-regressions-week

Nbody speed improvements

[trivial, not reviewed]

Several of Albert's nbody variations have been timing
out on memleaks testing since being moved to a
(slower?) virtual machine.  This gives a good excuse
to speed up some of the slower ones that remain
interesting.

The meat of the changes included:

* pulling out some zippered iterators (which have
  proven slower than ideal in other cases) and
  replaced them with domain/range iterations
  and random access

* avoided the use of array slicing in the inner loop

* used 'refvar' declarations to capture references
  to the bodies in question instead of the previous
  two idioms.

This seems to reduce execution time by about 50%.

While here, I also did some cleanup:

* For all the tests, I reformatted them to not use such
  crazy wide indentation in favor of 2-space indentation.

* While here, I also made 'do {' idioms into simply '{'

* Also did a bit of reformatting of the bodies: removed
  TAB characters and got rid of some needlessly blank
   lines.