HM/JPM: added 'import' / 'importTrig' on server; TODO: extend client
HM/JPM: restarting triplestore, clearing transaction log in importTrig
HM/JPM: suppressing and restoring standard error stream
HM/JPM: added importTrig to HttpClient (+some minor refactorings)
HM/JPM: applied license
"Created changeset importTrig"