* Added new variable vort for vorticity output

* Added calc of diag vorticity for evp, vp and eap for B, C and CD grids

* updated doc and ice_in file for new vorticity variable

* Changed output frequency of vorticity from m to x

* Added f_vort to set_nml.histall and set_nml.histdbg

* Specified location of divu, shear and vort in ice_history.F90

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Co-authored-by: Tony Craig <apcraig@users.noreply.github.com>