Update to Flume 1.6.0-SNAPSHOT and kite 0.15.1.
Update ElasticSearch to 1.3.2.
pom.xml: Re-arrange version properties.
Upgrade Stratio Streaming to 0.4.0.
Use old Flume release tarball to generate distribution.

Apache Flume 1.6.0 is not released yet, so we use 1.5.0.1 tarball
as the basis of our distribution.
stratio-streaming: Fix API change for 0.4.0.
Include SparkSink in our Flume distribution. Closes #27.
Merge branch 'develop' of github.com:Stratio/stratio-ingestion into develop

Conflicts:
	pom.xml