Update Custom Command demo
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Key: KARAF-1096
URL: https://issues.apache.org/jira/browse/KARAF-1096
Project: Karaf
Issue Type: Sub-task
Affects Versions: 3.0.0
Reporter: Jamie goodyear
Fix For: 3.0.0
Update readme to Karaf 3.0 tool chain.
Update poms/directories to kar packaging.
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