test: expand regex in test/basic

Over time, maintaining this very long regex has become irritating,
especially when resolving conflicts.

This patch replaces the call to sed with multiple extra arguments to
find.  Since each test binary is now on it's own line, this should
make resolving conflicts easier.
test: Test buttonization of id: links

This matches the current behavior of the buttonizer, so it passes, but
many of these cases are not what you'd want (and some of them aren't
even valid Xapian queries).  The next patch will fix the handling of
these cases and update the test.
emacs: Improve the regexp used to match id:'s in messages

This regexp agrees with Xapian query syntax much more closely, though
we specifically disallow various cases that would be confusing in the
context of an email body (e.g., punctuation at the end of an id: link
is not considered part of the id: link because it's probably part of
the surrounding text).

In particular, this handles id: links that are not surrounded by
quotes much better, which stash is much more likely to generate now
that we don't quote id's that don't need to be quoted.  It also
handles quoted id: links better.

We update the buttonization test to reflect the new pattern.
emacs: Buttonize mid: links

This adds support for RFC 2392 mid: message ID links.
test: Fix HTML rendering test

The test designed to exercise Emacs' rendering of HTML emails
containing images inadvertently assumed w3m was available under Emacs
23.  The real point of this test was to check that Emacs 24's shr
renderer didn't crash when given img tags, so use shr if it's
available, html2text otherwise (which is built in), and do only a
simple sanity check of the result.
notmuch-restore: remove extra increment of optind

This is left over from when the file name was a positional parameter.
notmuch-restore: fix error message for extra positional parameter.

Note that a single positional parameter will take this code path also,
so the old message really makes no sense anymore.
NEWS (for 0.15): Added note about Bcc & Reply-To headers in json output

notmuch show --format json now includes Bcc and Reply-To headers of
the message. Mention that in NEWS.
(Heavily modified version of text originally from Michal Nazarewicz.)
notmuch-tag: tidy formatting

This is just the result of running uncrustify.
notmuch-restore: tidy formatting

This is again the work of uncrustify.

I remember there is some controversy about "! foo" versus "!foo", but
in context I think "! foo" looks OK. Also, for functions "! foo
(blah)" seems better than "!foo (blah)".
notmuch-dump: tidy formatting

More uncrustify at work.
Update notmuch-mutt requirements in README file.

This updates the notmuch-mutt README file with requirements for the
recently added duplicate removal patch.

-Kevin
contrib: pick: bugfix when trying to show a non-message

If the user pressed return on the end result status line it gave a
blank message. Modify the function notmuch-pick-get-message-id to
return nil rather than an empty message-id in this case to fix this.

This also fixes a bug in the (lack of) quoting of the id string.
Fixed 2 misspellings of word 'separate'

"Seperate: The second most common misspelling on the Internet..."
(from http://www.re-vision.com/spelling/separate.html).

s/seperate/separate/ in debian/NEWS.Debian & test/README done.
Merge remote-tracking branch 'refs/remotes/origin/master' into labeler-integration

Signed-off-by: Damien Cassou <damien.cassou@gmail.com>