change format of time appearance to show up as hr:min pm/am.
create best_answer_id column for questions table.
add topic column to questions so that user can create a topic for their question; index and show.html will display question topics.
add topic header to index.html; install textacular gem.
WIP: create search method so that user can search a keyword and program will return questions with params that hold the keyword; need to implement JS.