refs #6750 - only rename archives in update script. do not rebuild archives without versions where they do not exist. Instead added a fallback in the api methods to build the reports on the fly if requested

a visitor now has a browser, browser name and browser version attribute, so it's clear what it's containing.

moved columns settings like segments to devicesdetection plugin and removed them from usersettings plugin

rename reports 'GetBrowserFamilies' to 'GetBrowsers' as families are more like engines and not browsers without versions

create column manually as update script is currently executed before the coulmn would be created automatically

coding style fixes, some PHPStorm inspection fixes, improved readability of code, few refactorings, all as part of our code cleanup strategy

refs #3962 - implemented new detection of browser engines. Merged old reports from UserSettings plugin to DevicesDetection plugin. Added segment option for browser engines. Added update script to move old archives and to update old visits with engine data