Configure.sh rewrite review fixes
Configure.sh rewrite review fixes

Add usage message for '-h' and '--help' invocation.

mpimenov/omim,milchakov/omim,rokuz/omim,rokuz/omim,darina/omim,darina/omim,rokuz/omim,mpimenov/omim,rokuz/omim,mapsme/omim,darina/omim,mapsme/omim,mapsme/omim,mapsme/omim,matsprea/omim,matsprea/omim,milchakov/omim,darina/omim,rokuz/omim,milchakov/omim,darina/omim,darina/omim,mpimenov/omim,mpimenov/omim,rokuz/omim,rokuz/omim,mapsme/omim,darina/omim,rokuz/omim,mapsme/omim,mpimenov/omim,mpimenov/omim,matsprea/omim,milchakov/omim,milchakov/omim,matsprea/omim,mapsme/omim,matsprea/omim,milchakov/omim,matsprea/omim,mapsme/omim,matsprea/omim,mpimenov/omim,mapsme/omim,milchakov/omim,milchakov/omim,mpimenov/omim,milchakov/omim,darina/omim,milchakov/omim,mpimenov/omim,darina/omim,rokuz/omim,rokuz/omim,rokuz/omim,darina/omim,mpimenov/omim,rokuz/omim,matsprea/omim,mpimenov/omim,mpimenov/omim,matsprea/omim,milchakov/omim,darina/omim,milchakov/omim,mapsme/omim,darina/omim,rokuz/omim,milchakov/omim,mapsme/omim,matsprea/omim,darina/omim,mapsme/omim,mpimenov/omim,mapsme/omim