Use RequireJS to load test data
Revert "Remove integration tests from CI build and watch until sporadic errors are resolved"

This reverts commit 6a474824a9929065a58b48f66e01cf84f0677e8d.
Include test data files in js hint
Remove obsolete model builder
Change speed limit stroke opacity
Rename linear assets to speed limits inside linear asset layer
Visualize speed limits of 70 km/h and above with dotted lines
Rename linear assets to speed limits in frontend code