possibility to see update log of XBVR database

[Sinoh726]

For managing purpuses it would be helpfull to have update log of actions taken on XBVR database like which scenes (by scene ID+site+description) were newly added, which modified (files assosiated), which were automatched, etc. In case user would manualy match 100+ files he could inspect in this file if he did some mistakes and fix them. It also helps to have quick overview of changes done during scraping of sites.