Fixes #2057 (broken internet archive links)
Including internet archive url test in existing test_parse_url function
Adding single quote anchor to parse_url unit test
Fixes #5418 adds enabled clause for annotations
not sure what a flush() is doing there
Fixes #5422 fixes tag processing for file plugin
Fixes #5441 deprecates the entity caching functions
Fixes #5419 adds tests for enabling/disabling annotations and fixes bug with deleting disabled annotations when deleting an entity
Merge pull request #5427 from cash/enabled_annotations

Fixes #5418 adds enabled clause for annotations
Add test for = lookbehind
Merge branch 'pr5416' into 1.8