mobile changed to phone

Changed mobile field for returnAddress & onloadAddress to phone. Reason is that mobile number is validated & phone number is only use for calling purpose which in most cases is needed for those addresses.

terminals & ability to deliver to postoffice

• added ability to get Pickup points;
• added examples how to get pickup points & how to get parcel label;
• removed unused vendors;
• added PickupPoint entity to add logical separation between Terminals & Post offices
• added deprecation errors for functions which will be removed in future releases;

create shipments & download labels

Added Omniva API with abilities to create shipment & download there labels.