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

started to handle changes to dimensions, for instance if a new dimension is added the platform should detect this and run an update script. also if a dimension suddenly handles new cases such as conversion it should automatically add a column to log_conversion after a user confirms. Have not tested update and/or installation yet

moved some more dimensions to plugins, fixed some issues, removed some more duplicated code etc. Tests will not be green as there fixes to country detection

I think we need to install those columns in UserSettings plugin as DevicesDetection is not enabled by default

starting to refactor reports into classes, also refactored some more dimensions which is still not 100% working and needs more work

starting to move dimensions from core into plugins and put each dimension into its own class. This is very experimental right now. More experimental stuff will follow