Add pilot API reference doc link to README
Add pilot API reference doc link to README

Adds the pilot API reference doc link to the README
yxd-hde/aws-sdk-go,yxd-hde/aws-sdk-go,yxd-hde/aws-sdk-go,yxd-hde/aws-sdk-go,aws/aws-sdk-go,jasdel/aws-sdk-go