v1.5.1
un-set encryption for the app bundle.

may have resulted in app becoming invisible on some devices.

should be safe since everything that is inside `$SANDBOX/OnionBrowser.app/`
is literally just our app bundle. (user data goes into `$SANDBOX/Documents`
or `$SANDBOX/Library` or `$SANDBOX/tmp` or etc.)
revert clobbered changelog edit
Active Content Blocking: also block WebWorkers. scripts loaded inside web workers bypass content blocking.
tweak wording on settings
OpenSSL 1.0.1h
Onion Browser 1.5.2
updated build date
availability date