add generation of a .tar.gz to release script
fix download URL in the 'storm' command
add *.tar.gz to .gitignore
Ensure we don't overflow the backoff value.

The first attempt to fix this (213102b36f890) did not correctly address
the issue.  The 32 bit signed integer frequently overflows, resulting in
a bad value for Random.nextInt().

The default for storm.messaging.netty.max_retries is now 30 (instead of
100), and there is an upper limit of 30 for max_retries.

I also did a whitespace cleanup.
Merge pull request #726 from brndnmtthws/nm

Ensure we don't overflow the backoff value.
Merge branch 'release-cleanup'
bump version for 0.9.0 release
update changelog for 0.9.0 release
update build to force Java 1.6 compatibility.