With pbr 2.0 and Sphinx 1.5, the setting for treat sphinx warnings as
errors is setting warning-is-error in build_sphinx section. Enable this.
Change-Id: I39ffb22c37a05f00cade2fbd14449eaf77dc3d39
Provide basic but hopefully useful man page.
Also update OpenStack LCC to OpenStack Foundation in docs.
Resolves: bug 1193111
Implements blueprint: clients-man-pages
Change-Id: I9502b3d5ca75149d747d523934a6401e435924b7