With the large reorg of the docs site, this can be easily *only* as
part of the murano documentation, there's no benefit for publishing an
extra document elsewhere. Fully integrate the documents into the manual.
Note that the separate build target was not linked from any of our index
sites.
Remove extra title from README.rst, it let to duplicated title in main
table of contents.
Remove also post job for publishing the firstapp document - it currently fails -
and is now not needed anymore.
Change-Id: Ib5259907b3f999062042e483ac81e6aed17705ca
abb58a8d06