Configure to use angulartics.

Signed-off-by: tungpham31 <tungpham31@gmail.com>
Tracking course page event.

Signed-off-by: tungpham31 <tungpham31@gmail.com>
Update .gitignore.

Signed-off-by: tungpham31 <tungpham31@gmail.com>
Track lectures.
Track account activation.

Signed-off-by: tungpham31 <tungpham31@gmail.com>