Added utility method to create a list of implementation class names
Merge branch 'boot'
Added TogglzBootstrap interface for a more advanced way of boostrapping the FeatureManager
Added Services class to simplify working with SPIs
Added FeatureManagerListener interface for observing lifecycle events
Log Togglz version on startup
Fixed minor typo in error message
Added new RequestListener SPI for the servlet module
Merge branch 'boot'