add travis configuration file

Change-Id: Ic5009d0225930f7b430e5df5c15447f8e53ba4ab
Merge pull request #7 from mildis/travisIntegration

add travis configuration file
Add Travis build status badge
test configuration validity once in initializer only

Change-Id: I102edc5b82ff6f1ca0e39b1d2736707b289bf992