Make AMD module 'angular-logX' the main AMD module

After merging this PR, we'd have the situation:

1. If you need a decorated logger, just require 'mindspace/logger/ExternalLogger'
1. If you need decorated loggers with AngularJS, require 'angular-logX' and add require('angular-logX').name to your AngularJS module.

This solution is not tainted with side-effects as the current solution is.