Blurb:: Invoke Dakota with pre-run mode active

Description:: When specified, Dakota execution will include the
pre-run mode, which sets up methods and often generates parameter sets
to evaluate.  This mode is currently useful for parameter study, DACE,
and Monte Carlo sampling methods.

<b> Default Behavior </b>

When no run modes are specified, Dakota will perform pre-run, run, and
post-run phases.

Topics::	command_line_options
Examples::
Theory::
Faq::
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