[ET Trac] [Einstein Toolkit] #1152: Add option to compute center of mass to hydro_analysis and lots of smaller changes

[Einstein Toolkit]

#1152: Add option to compute center of mass to hydro_analysis and lots of smaller
changes
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 Reporter:  rhaas                  |       Owner:     
     Type:  enhancement            |      Status:  new
 Priority:  minor                  |   Milestone:     
Component:  EinsteinToolkit thorn  |     Version:     
 Keywords:  Hydro_Analysis         |  
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 The attached set of patches adds the possibility to compute a center of
 mass location to hydro_analysis. It works by computing the center of mass
 (via x[idx]*rho[idx]) of the matter in a region of radius
 Hydro_Analysis_r_core around the point of maximum density. Only points
 whose density is above a fraction Hydro_Analysis_rho_core_rel_min of the
 maximum density are considered.

 I also include a number of bugfix patches and patches to make
 Hydro_Analysis more controllable by user input rather than hard-coded
 values. All patches contain a short description in the patch (ie. the git
 commit message).

 The ones adding extra control and/or warnings are:
 * Hydro_Analysis: add verbosity_level option to control how much data to
 output to stdout
 * Hydro_Analysis: use Fortran modules for prototypes if available
 * Hydro_Analysis: add parameters to control which interpolator is used
 * Hydro_Analysis: make parameters steerable
 * Hydro_Analysis: warn if grid point with maximum value cannot be found on
 grid
 * Hydro_Analysis: add parameter Hydro_Analysis_comp_rho_max_every
 * Hydro_Analysis: add option rho_max_loc_use_rotatingsymmetry180

 * Hydro_Analysis: add option to average the location of multiple identical
 maxima
 * Hydro_Analysis: fiddle with when to warn about multiple identical maxima

 Bugfixes are:
 * Hydro_Analysis: checkpoint grid scalars
 * Hydro_Analysis: do reduction in global mode

 New feature:
 * Hydro_Analysis: add routine to compute center of mass in core region

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1152>
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