Set next version to 2.0.0.
Set next version to 2.0.0.

The public API change in cli.rb breaks backwards compatibility.

The change in cli.rb does not affect the command-line interface usage.

dojo4/s3_website,pathawks/s3_website,page-io/s3_website,WangKaimin/s3_website,page-io/s3_website,xpekatt/s3_website,WangKaimin/s3_website,SivagnanamCiena/s3_website,xpekatt/s3_website,SivagnanamCiena/s3_website,pathawks/s3_website,dojo4/s3_website