Added index to btSurveyResults.optionID for join to btSurveyOptions table

Added index to btSurveyResults.cID (cID, optionID, bID) for join to Collections table and for query where

Added index to btSurveyResults.bID (bID, cID, uID) for join to Blocks table and for query where

Added index to btSurveyResults.uID for join to Users table