Fix typo in README
Fix typo in README

cosumized -> customized

urfave/cli,phinnaeus/cli,codegangsta/cli,pjvds/cli,phinnaeus/cli,murdinc/cli,phinnaeus/cli,urfave/cli,minio/cli,murdinc/cli,pjvds/cli,codegangsta/cli,pjvds/cli,murdinc/cli,minio/cli,minio/cli