Update release notes for 0.8.1.
Fix zookeeper recipe filename.
WHIRR-672 - Allow eager caching of instance hostname based on pre-provision instance metadata. Contributed by Graham Gear.
WHIRR-675 - Convert all whirr.env.* environment variable labels to upper case. Contributed by Graham Gear.
WHIRR-671. Create Kerberos Service. Contributed by Graham Gear.
WHIRR-679. Switch to HBase 0.94.2. Contributed by Andrew Bayer.
WHIRR-680. Add python scripts to aid ssh/scp in to VMs. Contributed by Steve Loughran.
WHIRR-691. Java install to support Debian. Contributed by Graham Gear.
WHIRR-673. Upgrade CDH Repos for RHEL/CentOS 6. Contributed by Graham Gear.
WHIRR-699. Fix indentation and formatting on "Getting Started" page. Contributed by Mark Grover
WHIRR-696. Whirr script for Hadoop MRv2 YARN installs that supports Hadoop-2.0.x and Hadoop 3.x (trunk) branches. Contributed by Eli Reisman.
WHIRR-707. RunUrlStatementTest fails due to missing URL.
WHIRR-660. Provide useful error message/exception if empty instance templates
WHIRR-634. Update private IP host file entry when required by AUTO_HOSTNAME_SUFFIX. Contributed by Graham Gear.
WHIRR-661. Upgrade to Hadoop 1.0.3. Contributed by Steve Loughran.
WHIRR-681. Enhance puppet service with an ability to export cluster topology to the puppet code. Contributed by Roman Shaposhnik.
Merge branch 'trunk' into graham-patch-IMAGEHACKS