New Features

• CAPE now includes PreShellCmds to go alongise PostShellCmds. This is an
  option in the "RunControl" section that allows the user to run one or
  more BASH (or whatever your shell of choice is) commands prior to running
  the primary CFD solver executables.

• There is an exciting new feature called WorkerShellCmds in the
  "RunControl" section. It allows you to specify 0 or more BASH commands
  that you run every WorkerSleepTime seconds (default=10.0) while your
  case is running. It has working clean-up after the main executable is
  finished, allowing up to "WorkerTimeout" (default=600.0) seconds
  for the last instance of the worker to complete.

• These run hooks also have Python function versions, in the form of options
  PrePythonFuncs, PostPythonFuncs, and WorkerPythonFuncs. If these are
  defined as a simple string, CAPE will import any modules implied by the
  function name and then call that function with no arguments. However, users
  may also specify more details for Python functions by defining the function
  in a dict.

    "RunControl": {
        "WorkerPythonFuncs": [
            "mymod.mufunc",
            {
                "name": "clean",
                "type": "runner"
            },
            {
                "name": "mymod.otherfunc",
                "args": [
                    "$runner",
                    "$mach"
                ]
            }
        ]
    }

• Users of FUN3D and Kestrel can now link the mesh file into folders instead
  of copying it. Set "LinkMesh" to true in the "Mesh" section.

• cape.pyfun in particular changes how it uses XML or JSON configuration
  files (which is specified in the "Config" > "File" setting). In
  previous versions of CAPE, the face labels or component ID numbers in that
  file had to match your actual grid, which had to match your .mapbc
  file. Now CAPE only uses the text names in the ConfigFile, and it's ok to
  include components that aren't actually present in your grid. If your case
  worked as expected before, it will still work now, but for new cases it
  might be much easier to set up. The (new) recommended process is to use a
  ConfigJSON file and only specify a "Tree" section.

Behavior Changes

• Binary files storing iterative histories are no longer saved automatically
• Calculation of job status, especially for FUN3D, is much faster. This
  change should not cause any functional changes for users.
• Python modules used to define hooks are no longer universally imported
  during Cntl instantiation. Modules are imported dynamically if needed
  to execute a hook. The "Modules" setting is still present in the JSON
  file but has no effect.

Bugs Fixed

• Fix bug in area-weighted node normal calculation,
  cape.trifile.TriBase.GetNodeNormals().
• The refine/three capability with FUN3D now works more reliably.