1.5.4
fix #1000 TemplateTestCase.getWidgetInstance does not work
close #1146
fix #1148 disable npm spinner on travis

npm 1.4.11+ uses spinner (progress indicator) which messes with the output
of the test suite, making it less readable. There's no need for it during
Travis builds.
fix #1126 Datamodel change for rangevalues

close #1136