Added logic to show the prior selected values on pickers
Merge pull request #8 from newtechfellas/PrevAndQuesRemodelling

Added logic to show the prior selected values on pickers
basic shells for topicwise questions
Added views for topicwise questions selection
Added functionality to render 1st and 2nd years topics
added footer to topic wise questions view
made multi select, changed css to add tick mark for tap using ListItem
fixed picker creation every time mock test is launched and formatted topic-wise related code
added more mock data