[HADOOP-13383] Update release notes for 3.0.0-alpha1

• Type: Improvement
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 3.0.0-alpha1
• Component/s: documentation
• Target Version/s: 3.0.0-alpha1
• Assignee: Andrew Wang
• Reporter: Andrew Wang
• Created: 16/Jul/16 02:32
• Updated: 21/Jul/16 01:51
• Resolved: 20/Jul/16 23:59

Description

Per the release instructions (https://wiki.apache.org/hadoop/HowToRelease), we need to update hadoop-project/src/site/markdown/index.md.vm to reflect the right versions, new features and big improvements.

I can put together some notes for HADOOP and HDFS, depending on others for YARN and MR.