Changes in version 1.1.6
+ add gcs_rm function
Changes in version 1.1.5
+ Add gcloud into the default authentication process
Changes in version 1.1.4
+ gcs_is_requester_pays supports uri
+ Better print format in gcs_get_cloud_auth 
Changes in version 1.1.3
+ FileClass object can show the file URL now
+ no warning will be given if `gcs_dir` find a non-standard file path
+ Fix some word issues: all xxx_url functions are renamed to xxx_uri
Changes in version 1.1.2
+ Support Requester Pays
+ Support `~` symbol to go to the bucket root
+ Support conversion from Folder/File class to character
Changes in version 1.0.0
+ Publish in Bioconductor