ioget_vdim_p: parallel version of ioget_vdim (hide parallelism)
restini_p: parallel version of restini (hide parallelism)
restVarExists: check whether a variable is found the restart file (avoid the use of restget to define a variable)
restSetArgs: define common arguments for restget and restput subroutines (simplify restget_p and restput_p to varname and vardata)