Function: Check if a user can answer on a question.
Function: Check if user can select an answer.
Function: Check if a user can edit answer on a question.
Function: Check if a user can edit answer on a question.
Function: Check if user can edit a question.
Function: Check if user can change post label.
Function: Check if user can comment on AnsPress posts.
Function: Check if user can edit comment.
Function: Check if user can delete comment.
Function: Register anspress option tab and fields.