Add source/_static directory
Add source/_static directory

To avoid warnings when building the documentation.

Change-Id: Iaf84c2f1ebaae7c93994e524f23e3a7f31005db3

stackforge/fuel-plugin-lma-collector,stackforge/fuel-plugin-lma-collector,stackforge/fuel-plugin-lma-collector,stackforge/fuel-plugin-lma-collector,stackforge/fuel-plugin-lma-collector