Introduce the DirectoryFilter
Introduce the FileFilter
Correct some docs
Pull filter combination stuff into a base class
pull up chain filter utilities into base test class
Introduce LogicalOrFilter

`ChainFilter` is consensus based: all filters must be met. We need to
combine filters with `OR` for some file-based filters.
Add the path's argument to the console
Add Acceptance Tests for the new Path Filtering
Document the new paths feature
Merge pull request #40 from chrisguitarguy/file_filters

File & Directory Based Filters