Please Add Referral Summary example to Documents heading

[anna-otrokhova]

Please Add Referral Summary example to Documents heading
( We have only Discharge Summary now) http://prntscr.com/i507zj

Related issue: QEWD-Courier/Ripple-Qewd#77

[anna-otrokhova]

This task needs to be checked after adding the example.
All works on the front end side have been already done.