register packages with priority, do initialization chain correct.
changed polite.path() behavior [tests ok]
changed driverLocator apis [tests ok]
first implementation of plugins in both "syncronous value waterfall" and "asyncronous queque".

may be i'll change some api this afternoon...
sync, syncSeries, waterfall
exported plugin manager to a dedicated module used now as dependency
apply plugin module api to test plugins
Merge branch 'feature.mpeg005.plugins'
pushed the driverCollector service to a standalone module called "polite-driver-manager"
Merge branch 'feature.driver-manager-as-module'
Merge branch 'origin/master'