Add the filelist interface

Fixes #52 (closed)

bob/bio/base/database/filelist/__init__.py

+from .models import ListReader, Client
+from .query import FileListBioDatabase
+
+
+# gets sphinx autodoc done right - don't remove it
+def __appropriate__(*args):
+  """Says object was actually declared here, and not in the import module.
+  Fixing sphinx warnings of not being able to find classes, when path is shortened.
+  Parameters:
+
+    *args: An iterable of objects to modify
+
+  Resolves `Sphinx referencing issues
+  <https://github.com/sphinx-doc/sphinx/issues/3048>`
+  """
+
+  for obj in args:
+    obj.__module__ = __name__
+
+
+__appropriate__(
+    ListReader,
+    Client,
+    FileListBioDatabase,
+)
+__all__ = [_ for _ in dir() if not _.startswith('_')]