Added log enablers/disablers for all logger types on $logProvider

This is a pretty simple update.  It extends the log provider to allow toggling for each log output type, instead of just for `$log.debug`.
there's no way to toggle this setting after the config phase (without hacks).

A smaller solution would be `log ? consoleLog('log') : noop`

However this still looks really big and maybe not that useful. Something closer to karma's logLevels might make more sense