Revert "Updating demo example for 0.8.0."

This reverts commit 92997775eaa8b3d5b35129b585eca885a41e2454.

Revert "Updating logging example for 0.8.0."

This reverts commit 21e0321f00a6c6e54191d6e4e70ee951e2931560.

Revert "Updating logging-webapp example for 0.8.0."

This reverts commit 68fd17f5bfa6b1ff7fef209e2018ec995698e11d.

Revert "Updating dataset-staging for 0.8.0 release."

This reverts commit 57aa41c8d34c71e5c7ba1eb98668220786a4e15b.

Revert "Updating dataset example to use schemaUri(resource:)"

This reverts commit 99e3b37ba60e0006c389a8a5cb862cd553c0b610.

Revert "Updating dataset example for URI repo instantiation."

This reverts commit c11067a4251d6ffbfb18afbed4ba90427c18ae33.
Update dataset-staging to correct version number.
Updating dataset example to use schemaUri(resource:)

This removes the need for users to use Resources.getResource and parse
the URL returned themselves.
Prepare for next development iteration 0.8.1-SNAPSHOT
First attempt at an HBase example.
Managed schema table is now created by the repo.
Use HBaseDatasetRepository Builder class
Use HBaseDatasetRepository#delete rather than deleting the underlying tables.
Mark username column as a key in schema.
Key values must be an integer indicating the order.
Update to use 0.8.1-SNAPSHOT
Use CDK Maven plugin to create and delete datasets.
Add an example of schema migrations.
Mention schema updates are idempotent.
Update to version 0.9.0-SNAPSHOT following creation of 0.8.1 branch.
Added HelloCDK.java which is as close to a HelloWorld example as possible. The example creates, writes and reads from CDK.
Updated READMEs to show the HelloWorld code.
Updating HelloCDK: README discussion, use local FS.

This adds a section that explains the new example more thoroughly to the
README, and makes a couple of minor changes to the code:
1. Uses DatasetRepositories to get a repo, which looks easier
2. Uses a local FS repo to not require HDFS for the hello world
3. Adds Hello#sayHello to demonstrate it's a real object and has methods

Using DatasetRepositories required adding findbugs annotations jar.
Adding README changes from 0.7.0 branch.