Minor cleanups for SDK devsite docs.

native_client_sdk/src/doc/README

 nacl-docs-rst
 =============
 
 Directory structure
 -------------------
 
 This is a tree of .rst files that represent the source of the NaCl
 documentation. Some of the files and directories here are special:
 
 * conf.py: Sphinx configuration file
 * images/: Images are stored here. Note that this isn't necessary - Sphinx
   doesn't mind about interspersing images in .rst directories.
 * _sphinxext/: Code of the Sphinx extension we use to generate HTML from .rst
 * _static/: Static files, like CSS, for the documentation. This should be seen
   as part of the infrastructure - the real CSS comes from the real doc
   publishing server.
-* _build/: Build artifacts (not checked into source control).
+* out/: Build artifacts (not checked into source control).
 * Makefile & README
 
 How to build
 ------------
 
 To build the docs you will needs sphinx installed (and sphinx-build in your
 path), and simply run:
 
-    make devsite
+    make
 
 To rebuild all the pages always, add 'SPHINXOPTS=-a', e.g.:
 
-    make SPHINXOPTS=-a devsite
+    make SPHINXOPTS=-a
 
 To emit local-testing mode, instead of production mode, add:
  SPHINXOPTS='-D devsite_production_mode=0'
 e.g.:
 
-    make SPHINXOPTS='-D devsite_production_mode=0' devsite
+    make SPHINXOPTS='-D devsite_production_mode=0'
 
 Production mode contains devsite-specific templating and non-HTML constructs.
 
 The builder prints out the value of this setting - make sure it's what you
 expect it to be. For example:
 
-  $ make devsite
-  sphinx-build -b devsite -d _build/doctrees   . _build/devsite
+  $ make
+  sphinx-build -b devsite -d out/doctrees . out/devsite
   Running Sphinx v1.2b1
   loading pickled environment... done
   ----> Devsite builder with production mode = 1
 
 Local HTTP server to view the docs
 ----------------------------------
 
 To view the HTML locally, build the docs with production mode turned off, and 
 run:
 
     make serve
 
 This will start a webserver on the local machine, and allows the pages
 to be viewed by in a browser by navigating to:
 
     http://localhost:8009/
 
 Serving through a server and not just file:/// because this way the <link>
 relative paths to CSS actually work.