DATAFU-4 Update source files with correct Apache boilerplate

https://issues.apache.org/jira/browse/DATAFU-4

Signed-off-by: William Vaughan <wvaughan@linkedin.com>
DATAFU-2 UDFs for entropy and weighted sampling algorithms

https://issues.apache.org/jira/browse/DATAFU-2

Signed-off-by: Matt Hayes <mhayes@linkedin.com>
Clean up README file

This makes the README file much more concise and too the point.  It generally directs the user to the official website, but also includes a few useful pointers at well to help them get started.

Signed-off-by: William Vaughan <wvaughan@linkedin.com>
DATAFU-11 ReservoirSample does not behave as expected when grouping by a key other than ALL

* For algebraic, clear the reservoir before each use.
* For accumulate, clear reservoir in cleanup and don't null out scoreGen to avoid unnecessary garbage collection.

Signed-off-by: William Vaughan <wvaughan@linkedin.com>
Test commit to verify account.
Test commit to check account
Checking connectivity.
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-datafu
 check
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-datafu
DATAFU-5 update SimpleRandomSample to be consistent with SimpleRandomSampleWithReplacement

https://issues.apache.org/jira/browse/DATAFU-5

Signed-off-by: Matt Hayes <mhayes@linkedin.com>
DATAFU-20 Initial commit of website content

Signed-off-by: William Vaughan <wvaughan@linkedin.com>
Merge with master
DATAFU-8: Port OpenNLP to DataFu

https://issues.apache.org/jira/browse/DATAFU-8

Signed-off-by: Matt Hayes <mhayes@linkedin.com>
DATAFU-18: Create datafu.util.RandomUUID UDF

https://issues.apache.org/jira/browse/DATAFU-18

Signed-off-by: Matt Hayes <mhayes@linkedin.com>
testing scm setup
Merge with master
Merge with master
Check scm setup
DATAFU-29 StreamingQuantile PDF link is broken

* Fix hourglass blog post link to non-existent page.
* Fix MunroPat pdf link in javadocs.

https://issues.apache.org/jira/browse/DATAFU-29

Signed-off-by: William Vaughan <wvaughan@linkedin.com>