Version bump to 0.3.0

Track changes since last 3rd-party review

Reconcile Automobile with AutomobileTrip

Regenerated gemspec for version 0.1.5

Regenerated gemspec for version 0.1.3

Regenerated gemspec for version 0.1.2

Regenerated gemspec for version 0.1.1

Regenerated gemspec for version 0.1.0

Regenerated gemspec for version 0.0.16

Regenerated gemspec for version 0.0.15