Made a.m.blender_cloud a module directory

Moved original file contents to blender_cloud/texture_lib.py, to allow
space for a future blender_cloud/home_project.py file.

pillar/application/modules/blender_cloud/__init__.py

@@ -0,0 +1,5 @@
+
+def setup_app(app, url_prefix):
+    from . import texture_libs
+
+    texture_libs.setup_app(app, url_prefix=url_prefix)

pillar/application/modules/blender_cloud/texture_libs.py

@@ -18,7 +18,7 @@ TEXTURE_LIBRARY_QUERY_ARGS = {
     'max_results': 'null',  # this needs to be there, or we get a KeyError.
 }
 
-blueprint = Blueprint('blender_cloud', __name__)
+blueprint = Blueprint('blender_cloud.texture_libs', __name__)
 log = logging.getLogger(__name__)