Update README.md

We will add it when a stable version is out.

Change to 1.9 symbol-hash syntax

Don't swallow unhandled exceptions.

Add callbacks, implement instrumentation as callbacks, and have the enqueue methods return a job instance

Active Job Railtie

Added tests for logging

DRY in helper.rb

Don't deserialize parameters in individual adapters.

It's not their responsibility and this makes logging (and rescuing from errors, eventually!) a lot easier.

Ensure we are logging the serialized args.

Use ActiveJob::Base.logger instead ActiveJob::Logging.logger

Implement enqueue_at/enqueue_in