added queryRelatedRecords() and multiple attributes
added queryRelatedRecords() and multiple attributes

Added new method queryRelatedRecords() for querying related tables/fc via relationshipId.

added attributes for Layer class:
* supportsApplyEditsWithGlobalIds
* supportsCalculate
* supportsValidateSQL
* dateFieldsTimeReference
adegwerth/ArcREST,BrunoCaimar/ArcREST,Esri/ArcREST,DShokes/ArcREST,pLeBlanc93/ArcREST