Rev 587

* Output hh data after NYSKIP only
* Fix accidental implicit variable use
Rev 588

* Initialize maturity ratio (rto) in grow.f
* Re-enable iterations over management operations disabled in Rev 585 (simulate.f)
* Redundant (?) initialization for inum3sprev (pmeas.f)
Merge tag 'rev588_vanilla'
Bump revision to 588 in CMakeLists.txt