Updated documentation to reflect breaking changes in v0.2.7
Updated documentation to reflect breaking changes in v0.2.7

AlexanderMazaletskiy/Realm-JSON,primax79/Realm-JSON,matthewcheok/Realm-JSON,switchapp/Realm-JSON,Muoverti/Realm-JSON,BenLoomToys/Realm-JSON,iOS--wsl--victor/Realm-JSON,ChristianRonningen/Realm-JSON,orkenstein/Realm-JSON