Added Travis build status.

README.md

@@ -4,3 +4,5 @@ This is a copy of the original DDD Sample app hosted at SourceForge.
 Our intention is to move everything from SourceForge to GitHub in due time while starting upgrading both the technical aspects as well as the DDD aspects of the DDD Sample.
 
 Discussion group: https://groups.google.com/forum/#!forum/dddsample
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+![Build Status](https://travis-ci.org/citerus/dddsample.svg)