Update Example_of_RSP-QL_query

Comments on introducing new keywords :
SEQ: if we introduces new keyword SEQ for expressing order constraint, why don't we introduce keywords for 13 Allen's interval operator? for instance, BEFORE/MEETS/OVERLAPS/STARTS/DURING/FINISHES/EQUAL + inverse version of them (practically, it's the same effort for parsing)
STREAM in WHERE together with FROM NAMED STREAM [...] as ... then keyword WINDOW inside WHERE: is there any shorter way to express this? for instance, just STREAM keyword inside WHERE?
Merge pull request #1 from lpdanh/patch-1

Update Example_of_RSP-QL_query