IOS_Add_UI_Search_Friends

IOS Feature #4 Implement "Invite Friends" page.
https://docs.google.com/a/wirezy.com/spreadsheets/d/1L3XKrm3DVh_Kv01R-5NhFfp-tqcCLhNCI8F-DNvB_UQ/edit#gid=0
-Trello: https://trello.com/c/woHUx3ko/51-16-35-implement-invite-friends-page
-Testcase: https://docs.google.com/spreadsheets/d/1YXhKNi3YODCGg-Fk817K_Jk7gmM0Nhkie6RWptWEJww/edit#gid=1624218583