doc(template cache): update to latest changes
test(angular): Track referenced but not exported symbols
chore(tests): Un-iit a test
Revert "test(angular): Track referenced but not exported symbols"

This reverts commit 7bc327492c7993f7eb25e792ba16367653518713.

It is buggy in dart2js.
chore(template_cache_generator): move options to flags with sensible defaults
feat(template_cache_generator): Support custom template path resolution