Default settings require empty config.properties

We define a few default settings for the different annotators. However, these are only loaded when the current directory contains a `config.properties` file (can be empty). The issue is that `setProperties(..)` doesn't get called without an existing properties file: https://github.com/HazyResearch/bazaar/blob/master/pipe/src/main/scala/com/clearcut/pipe/Main.scala#L81  
