Merge pull request #16 from SafeCodee/master

Booking class
fixed search booking scenario and api
added delete booking functionality and retrieve-delete-booking scenario
Corrections.
added search flight scenario and flights.js
fix booking.js
Merge remote-tracking branch 'alpha/master'
Merge pull request #20 from PoiskSboev/master

I want to propose this changes
add new booking-security-info
added retrieve-update-booking scenario and booking.js update
Merge pull request #21 from PoiskSboev/master

some new features
added new structure elements
Merge pull request #22 from PoiskSboev/master

added new structure elements
Added methods update, delete, constructor in coffee script