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

- Add override hierarchy description as comment.
- Be more verbose about used private configuration.
- Some rephrase for boost errors messages.

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