Wonolog Versions Save

Added

• Introduce support for wonolog.log.{$level} hooks
• Introduce new MailerListener to log wp_mail events

Changed

• Changed PhpErrorController method names to use snake_case.
• Refactoring of bootstrap file, delay of bootstrap routine to priority 20 of "muplugins_loaded"
• Updated README with info on new and changed features

Fixed

• Removed type-hint from PhpErrorController::onFatal() because it causes issues with PHP7

First release.