Minio server release with new improvements.

Browser improvements: 🍰

• History based UI, remembers your previous URLs
• Transformations and reload animations
• Asset size reduction from 4MB to 650KB
• Adding new icons for more file types
• Notification improvements

Server side: 🍰

• Rewrite of ListObjects, major performance improvements and simple code base
• Implements new APIs - CopyObject (server side copy), Multiple Object Deletes (1000)
• Ports merged browser and server are both on port 9000 by default.
• Docker registry support
• Re-write of signature v4 and cleanups.
• Use MINIO_ACCESS_KEY, MINIO_SECRET_KEY to override access and secret keys.
• Now GetObject and HeadObject both support more request headers.
  • If-Modified-Since, If-Unmodified-Since
  • If-Match, If-None-Match
• Implements support for basic Bucket Access Policy