Prepare load_dependencies code for saving dependencies like 'if tx.q.a, then ty'
Prepare load_dependencies code for saving dependencies like 'if tx.q.a, then ty'

load_dependencies now uses next topic instead of current topic when searching for next question.

Goodly/TextThresher,Goodly/TextThresher,Goodly/TextThresher,Goodly/TextThresher