v1.0.0

• Bump the supported sprockets version to v4
• Add support for Opal v1.1
• Only support Ruby comments in directive preprocessor (no one should have ever used "//", ["/", or "/")
• Fix the namespaces and move everything under Opal::Sprockets (the legacy namespaces will be dropped in version 1.1)
• The version schema has been simplified, not expecting sprockets to have major earthquakes like it was for v4