* mu4e/org-mu4e.el (org-mu4e-store-link): Add capture template keywords

For other email links (e.g., wl, mh, gnus), a number of keywords are
defined in org capture templates.  This makes these keywords available
for use in captures from mu4e.

http://orgmode.org/manual/Template-expansion.html

Inspiration from Roelof Burger
https://groups.google.com/d/msg/mu-discuss/4sffZofVKAY/aVTdVYoVyiUJ
Guard against nil in mu4e~guess-maildir (Fixes #472)

Add a guard so we don't error out if string-match evaluates to nil
Check for specific gmime-2.6 version (fixes #473)

Apparently, some gmime-2.5 versions match gmime-2.6 (pkgconfig) but
don't have the required API.

2.6.10 (2+ years old) is reported to work; test for this.
Some documentation fixes

(Thanks to Joe Corneli)
Bump version to 0.9.10
Rework getting database version (#469)

It seems we don't get the correct database version in some case with
some compilers, optimization flags. Suspecting some stale ->c_str().
Document that mu4e-maildir must not be a symlink ('fixes' #453)

mu doesn't support symlinks; document this. You can use hardlinks
instead of course.
Allow delete keybinding in console view-mode

Or, fix typo
Allow for gmime-2.6.7

See a86138a5. Apparently gmime 2.6.7 works fine as well.
Fix typo
Don't use g_clear_pointer yet, it's too new.

Do it the old way.
Add different face attribute for the mode-line

There is an additional face attribute for the mode-line.
Updated html export to org v8 standards

Replaced use of org-export-string with org-export-string-as to match
updated org coding standards.

This specifically addresses issue #391
Merge pull request #476 from zakkak/patch-1

Fix typo
Fix gpg decryption (#186)

After a multipart/encrypted part gets decrypted the result is usually a
`multipart/mixed` part (see enigmail).

Before this commit mime multiparts where handled only by
`g_mime_message_foreach`.  As a result the decrypted mime multiparts
where not processed.

This patch handles mime multiparts explicitly by removing the
`g_mime_message_foreach` invocations.  This might come at the cost of
reduced maintainability, in the case of radical gmime changes.  However,
gmime is pretty stable and that scenario is highly unlikely.

TODO: After decryption make any attachments available
Fix #186 part 2

This patch fixes the attachment listing when using `mu`.  For some
reason the '--decrypt' option among others where totally ignored when
listing the attachments.
Fix #186 Part 3

This patch fixes the attachment extraction (open, save, temp) when using
`mu4e`.  `mu4e` used to not notify the mu-server about the
mu4e-decryption-policy.  As a result mu-server did not decrypt the
attachments for extract, open, or temp.
mu-cmd-server: fix compilating warning (BSD_SOURCE)

Fedora-21's gcc started complaining about this
mu-threader: debugging for some reported problem in find_or_create
mu-msg-crypto: give better error when gpg is not found

also fixes some other warnings