Improvements in verification

• Add [#11]: Quality Summary and Preferred data sources in verification

• Add [#9]: Additional information how to install in README.md

• Add [#8]: Retry verification if any error happens in the process.

• Add [#7]: Add EditDistance field to verification output.

• Add [#6]: Add 'NoMatch' value to verification 'MatchType'.

• Fix [#5]: Hide verification "data" if it is empty.

• Remove [#6]: Remove Verified field, as it repeats 'NoMatch' information.