Added initial version of free flow analysis (AISAB-176)
Use vessel centers instead of ais positions in free flow analysis (AISAB-176)
Config file template including free flow analysis parameter keys (AISAB-176)
Add limited support for Track cloning (AISAB-176)
Edit format and contents of free flow report (AISAB-176)
Limit reports to max. one per hour per ship pair. Do not send empty reports. (AISAB-176)
Change reporting format to user desired format (AISAB-176)
FreeFlowAnalasis cron and min. reportingperiod made configurable (AISAB-176)
Added min loa pre-filtering to analysis (AISAB-184)
Merge branch 'feature-freeflow' (AISAB-176)