Do not memoize @template_list

This memoization effectively ties the list of selectable templates to
the ones that we memoize on the first API call when the app is
restarted.
Merge pull request #104 from travis-ci/ha-bug-no-template-memoization

Do not memoize @template_list
bump travis-build
Revert "bump travis-build"

This reverts commit 7730a8a9d38e3365c3544956081442be80081dc4.