mu-sexp-convert: Fix conversion of elisp times.

Previously, the first element was used where the second should have been.

In essence, whereas the algorithm is T[0]<<16 & T[1], the code was previously performing T[0]<<16 & T[0].

The timestamp produced was therefore inaccurate by up to about 18 hours.
Merge pull request #147 from mmirate/patch-1

* mu-sexp-convert: Fix conversion of elisp times.
* mu4e: update doc for mu4e-create-maildir-maybe
* mu4e: don't try to select nil window when updating mail
* mu: fix detection of urls with diacritics
* mu4e: handle empty contact lists
mu4e: fix `q' binding in About buffer

mu4e's About buffer uses org-mode and used to locally bind `q' to bury
the buffer.  However, altering local key map via local-set-key
shares binding with all buffers using the same major mode.  As a result,
after executing About mu4e once, pressing `q' in any regular org-mode
buffer was also burying it instead of inserting the letter `q'.

This commit fixes the problem by creating a new mu4e-about-mode
derived from org-mode and by defining `q' only for that mode.
Merge pull request #154 from tiborsimko/mu4e-fix-q-binding-in-about-buffer

* mu4e: fix `q' binding in About buffer