Update LICENCE
Update README.md
Update README.md
Added new API function to fetch merged time series data for several event keys;

/o?api_key=XXX&app_id=YYY&method=events&events=["event_key1","event_key2","event_key3"]
Merge branch 'master' of https://github.com/Countly/countly-server
Fix event edit view sorting to be the same as the events on the menu.
Fix /o/apps/mine API.
Merge remote-tracking branch 'countly/master'