modified Escher sequence to recognise RICH sequence after Rec v21r2
Since Rec v21r2 the old RICH sequence is not available by default even by selecting it in Escher().RecoSequence. This is solved by requiring RecSysConf in Escher to recognise both RICH and RICHFUTURE sequences. Further changes are applied for backward compatibility in the default running of data before 2017. From 2017 on, RICHFUTURE is taken as default.