go to div step3 when pressing next on step2:
add stripe + custom form
add user details input
add contact details form
clean up css
fix labels
add parsley.js
add contact details validation
add payment form with validation
add forward, back buttons to div3
change h3 to h2 in div3
Merge branch 'feature/user_details' into develop

* feature/user_details:
  change h3 to h2 in div3
  add forward, back buttons to div3
  add payment form with validation
  add contact details validation
  add parsley.js
  fix labels
  clean up css
  add contact details form
  add user details input
  add stripe + custom form
  go to div step3 when pressing next on step2:
add fullscreen class