chg: listvar(all) lists Top and Current instead of only Top
fix: handle undefined rings in ssi
fix memeory leak for undef. rings in ssi
fix: ssiReadRing for dummy rings
fix: in modstd.lib: pass the correct ideal to primeTest()
Merge pull request #409 from steenpass/modstd

fix: in modstd.lib: pass the correct ideal to primeTest()
fix: convert ptr to int via intptr_t
fix: stdint.h is needed on some systems for intptr_t
chg: defer shutdown caused by SIGTERM if necessary
chg: release acquired semaphores before shutdown
chg: new version of schubert.lib
Merge pull request #413 from steenpass/resources

release acquired semaphores before shutdown
fix: typo
chg: defer shutdown in slCleanUp() and slKill()
chg: messages about assign/conversion/calling: option(warn) -> TRACE
Merge pull request #415 from steenpass/defer_shutdown

chg: defer shutdown in slCleanUp() and slKill()
chg: make "=" for newstruct usable with >1 args on rhs
fix: default assignment for blackbox
fix: error check for system("install"..)
add: create Singular/rlimit.{c,h} for setting resource limits