Update CHANGELOG.md and include an example of the new unsupported class formatting feature.
Update CHANGELOG.md and include an example of the new unsupported class formatting feature.

ignazioc/JSONKit-NoWarning,MappingKat/tilemill,paulovieira/tilemill-clima,fxtentacle/tilemill,Jawbone/apptentive-ios,isaacs/tilemill,tilemill-project/tilemill,tilemill-project/tilemill,apptentive/apptentive-ios,paulovieira/tilemill-clima,Teino1978-Corp/Teino1978-Corp-tilemill,tilemill-project/tilemill,Zhao-Qi/tilemill,tizzybec/tilemill,florianf/tileoven,nyimbi/tilemill,nyimbi/tilemill,MappingKat/tilemill,paulovieira/tilemill-clima,tizzybec/tilemill,ajostergaard/ControlPlane,tizzybec/tilemill,ALHariPrasad/apptentive-ios,florianf/tileoven,nyimbi/tilemill,sahara108/apptentive-ios,Teino1978-Corp/Teino1978-Corp-tilemill,sahara108/apptentive-ios,Teino1978-Corp/Teino1978-Corp-tilemill,Jawbone/apptentive-ios,firstp2pdev-public/JSONKit,ajostergaard/ControlPlane,fxtentacle/tilemill,isaacs/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,apptentive/apptentive-ios,Empora/JSONKit,MappingKat/tilemill,mbrukman/tilemill,florianf/tileoven,paulovieira/tilemill-clima,mbrukman/tilemill,nyimbi/tilemill,tizzybec/tilemill,hibu/apptentive-ios,apptentive/apptentive-ios,Zhao-Qi/tilemill,Zhao-Qi/tilemill,fxtentacle/tilemill,hibu/apptentive-ios,fxtentacle/tilemill,hibu/apptentive-ios,tizzybec/tilemill,mbrukman/tilemill,paulovieira/tilemill-clima,ajostergaard/ControlPlane,MappingKat/tilemill,MappingKat/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,Zhao-Qi/tilemill,fxtentacle/tilemill,isaacs/tilemill,mbrukman/tilemill,Zhao-Qi/tilemill,ALHariPrasad/apptentive-ios,ajostergaard/ControlPlane,mbrukman/tilemill,nyimbi/tilemill,EadkennyChan/JSONKit