Update to 4.2.

- backport javascript functions.
- remove deprecation message from backported functions.
- fix queries and syntaxes.
- remove unused performance tester.
- update config settings to match 4.2.
- reflections is now string, not symbol.
- split off (/index) routes. For some reason it is always added now.
- DMailer is now plain ruby class.
- properly test xhr thingy.
- remove hooves