Add statistics variables to restart files

[bss116]

Currently only field variables are saved in the restart initd and inits files. If the time-averaged statistics variables are added, then the time-average of the statistics output will no longer be limited by the runtime. The variables that need to be added are a subset of the ones loaded from modfields by the subroutine statsdump in modstatsdump.f90:

u-dales/src/modstatsdump.f90

Line 333 in 9d25e6f

use modfields, only : um,up,vm,wm,svm,qtm,thlm,pres0,ncstaty,ncstatxy,ncstatyt,ncstattke,&

. This is done in modsave.f90 to write additional variables to the restart files and in modstartup.f90 to read in the additional variables at warmstart.