Merge pull request #48 from haoyuan/v3

update shark env
Changes for Spark 1.0
Merge pull request #49 from pwendell/v3

Support for Spark 1.0 configurations.
Fix SPARK_LOCAL_DIRS variable name
Merge pull request #50 from shivaram/v3

Fix typo in SPARK_LOCAL_DIRS
Fix --driver-* options being ignored
Merge pull request #51 from andrewor14/v3

[SPARK-1894] Fix --driver-* options being ignored
Adding Spark 1.0.0 download locations
Merge pull request #52 from pwendell/v3

Adding Spark 1.0.0 download locations
Support for r3 instance types.

Amazon's new r3 instances come without EXT3-formatted drives. This patch
adds a workaround that detects this situation and formats the drives
as ext3.

Hopefully this will be subsumed later if anyone wants to pick up
SPARK-1079.
Using XFS instead of ext3
Small fix
Merge pull request #53 from pwendell/v3

Support for r3 instance types.
Use ext4 for r3 SSDs.
Added a line of comment about TRIM support.
Merge pull request #57 from rxin/ext4

Replace xfs with ext4 for r3 SSD instances
Links for Spark 1.0.1 release
Install xfsprogs before mkfs.xfs
Merge pull request #59 from shivaram/v3

Install xfsprogs before mkfs.xfs
add links for spark v0.9.2 release