handle the case where phrase is empty
also try to avoid unnecessary quotes when replying (see issue #217)
wrong comment, probably copied from add code. params[0] is remove of course
* guile: add find-dups script, to find duplicate messages
Merge pull request #238 from jhelberg/master

* fixed #235
* mu4e: check marks in headers context (fixes issue #200)
* mu-find.1: small update
* mu4e-draft: fix typo in patch
* mu4e: fix typo
* make mu4e-compose-hidden-headers a public defvar; implements issue #237
* guile: make running guile scripts a bit more convenient, document it

  For example, you can now run a script like:

      $ mu msgs-per-month --textonly --query=hello
* cosmetics
* mu-guile.texi: minor change; may fix compilation
* mu4e: add note about notmuch conflict to FAQ (thanks to mistrey)