Added new GnuPG key 0xABC68E07

This commit is signed with the previous key(0xC0174749), for those who already
trust that key.
Add simple reading estimate to non-index pages
Complete conf.py rewrite

Far too much cruft in the quickstart generated file.
Update copyright years
Resync projects.rst
[QA] Minor grammar fix
Update hCard update time

Should have been done with a0effe5913889c3821f5e49bef1eab05b1d3dcfc.
[QA] Minor typo/spelling fixes
Enable sphinx spell checking extension

Upstream's version if breaks with Unicode input, so we rely on Dave's fixed
version.
Clean up Sphinx Makefile

Removes unused builders, and removes some duplication.
Resync projects.rst
[QA] Ignore venv directory

Shouldn't really be necessary...