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 type_cast method on connection adapter for rails 4.2 compatibility.
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.
Merge pull request #185 from Shopify/type-cast-rails-4.2

Use type_cast method on connection adapter for rails 4.2 compatibility.
Merge pull request #186 from Shopify/less-fragile-exec-query-expects

Make some exec_query expectations less fragile between rails versions.
Add CI testing of postgres support
test: Fix forcing the creation of a record with a given id.

The primary key can't be set using the attributes hash.  Postgres had a
problem with this because the id of the first row was set to a specific
value, which didn't count towards the id sequence, so it automatically
assigned 1 instead of MAX(id) + 1.