fix dt/reset changes

I saw (May 24 patch) that fix dt/reset now has a vector of length 1, with
the only element being the time step on which dt was last reset. However,
the documentation still shows the global vector of length 2, with the
first element storing the cumulative simulation time.

By the way, it seems to me that the scalar value is also redundant, since
you can get that from thermo_custom via "dt"; any reason why that was left
in, but the vector containing what is now equivalent to "time" was
deleted? Just curious.

Thanks as always!

Karl D. Hammond
University of Tennessee, Knoxville
[email protected]...

"You can never know everything, and part of what you know is always
   wrong. A portion of wisdom lies in knowing that. A portion of courage
   lies in going on anyway."
"Nothing ever goes as you expect. Expect nothing, and you will not be
   surprised."

The doc page is out-of-date, I will change it.

The 2nd vector element was dropped, b/c there
is a new thermo_style keyword “time” which

stores the cumulative simulation time, e.g. accounting
for changing timestep size.

Steve