fixing up theme paths to subjects' pages.

Signed-off-by: Gnanakeethan Balasubramaniam <gnanakeethan@gmail.com>
adding subjects page controller.

Signed-off-by: Gnanakeethan Balasubramaniam <gnanakeethan@gmail.com>
adding datatables styling.

Signed-off-by: Gnanakeethan Balasubramaniam <gnanakeethan@gmail.com>
creating subjects theme views.

Signed-off-by: Gnanakeethan Balasubramaniam <gnanakeethan@gmail.com>