Added moment js library

Signed-off-by: Shivam Dixit <shivamd001@gmail.com>
Added bootstrap datetime picker

Signed-off-by: Shivam Dixit <shivamd001@gmail.com>
Moved bootstrap min js from footer to header

Signed-off-by: Shivam Dixit <shivamd001@gmail.com>
Completed Add contest feature

Signed-off-by: Shivam Dixit <shivamd001@gmail.com>