Fix invalid parent cache invalidation
Add regression tests to ensure multiple parents of an embed object are expired properly
Add change description to CHANGELOG
Clean code based on feedback
Remove mocks from cache invalidation tetss
Use the new build env on Travis

faster vm boot times, more ram, more cpu, more awesome
Merge pull request #187 from joshk/patch-1

Use the new build env on Travis
Merge pull request #184 from Shopify/fix-parent-cache-invalidation

Fix invalid parent cache invalidation
Make some exec_query expectations less fragile between rails versions.

These expectations were failing on rails 4.2.0.rc1
test: Refactor a repeated query expectation into a helper method.