[maven-release-plugin] prepare release v1.0.0
[maven-release-plugin] prepare for next development iteration
Revert "[maven-release-plugin] prepare for next development iteration"

This reverts commit 0b49305297033b70cbb525bef54b70a14deeb238.
Revert "[maven-release-plugin] prepare release v1.0.0"

This reverts commit c3c6ea05d9d02a38b97388d583828ca82c5181db.
SPARK-1399: show stage failure reason in UI

https://issues.apache.org/jira/browse/SPARK-1399

refactor StageTable a bit to support additional column for failed stage

Author: CodingCat <zhunansjtu@gmail.com>
Author: Nan Zhu <CodingCat@users.noreply.github.com>

Closes #421 from CodingCat/SPARK-1399 and squashes the following commits:

2caba36 [CodingCat] remove dummy tag
77cf305 [CodingCat] create dummy element to wrap columns
3989ce2 [CodingCat] address Aaron's comments
18fc09f [Nan Zhu] fix compile error
00ea30a [Nan Zhu] address Kay's comments
16ac83d [CodingCat] set a default value of failureReason
35df3df [CodingCat] address andrew's comments
06d21a4 [CodingCat] address andrew's comments
25a6db6 [CodingCat] style fix
dc8856d [CodingCat] show stage failure reason in UI
(cherry picked from commit 43e4a29dacf61bea870ed5010d6df77bc8009aa3)

Signed-off-by: Patrick Wendell <pwendell@gmail.com>
Dev script: include RC name in git tag