This patch contains several changes to the documentation which
were brought about by, initially, removing the webapi/v1 page and
replacing it with a link to the /api-ref/ page.
As I did that, I saw that our front page (index.html) needed to
be updated as well, and decided that the front page needed to
actually be completely rerwitten -- while preserving all the links.
Some of the TOC links from the front page were malformed because
subpages included more than one H1 heading, so I had to make small
changes in the api-audit-support and code-contribution-guide and
dev-quickstart pages, in order for the front page to render properly.
As I corrected the headings on dev-quickstart, I realized the page
was not comprehensively organized, and so decided to reorganize the
sections and make it easier to navigate.
Here is a bullet-point summary of this change:
* Major changes to content and organization of index page
* Moved the version history from webapi/v1 to dev/webapi-version-history
* Added API conceptual guide at dev/webapi
* Replaced webapi/v1 with a link to dev/webapi, in case anyone
bookmarked it
* Removed doc references to webapi/v1
* Merged the pages dev/contributing and dev/code-contribution-guide
* Removed duplicate H1 headers in deploy/api-audit-support
* Reorganized and renamed section headers in dev/dev-quickstart,
and made some substantive corrections and changes as well
* Updated wording at the top of the index and deploy/user-guide pages.
Change-Id: Ib418e1d4fdfab4f0e15560270f39922e33df3f12
d0e49e1b41