replaces sed with elisp in re-tag action
* mu4e: replaces sed with elisp in re-tag action
mu4e: fixes new elisp re-tag implementation for forward slashes
* mu4e: make the +/- in +tag, -tag only match at the beginning of words
* mu: fix pre-condition warning when getting related messages without threads
Merge pull request #160 from tmalsburg/master

* fix issue #159, broken bindings in the headers menu of mu4e.
* mu: give a bit more info when there's no mu script (guile) support; fixes #156
* mu4e: uses correct helper function naming conventions.
* mu4e: Whoops, uses actual correct helper function naming conventions (~ instead of -)
* fix typo
* mu4e: retagging: +/- are only special at the beginning of terms (thanks to seanfarley)
Merge pull request #158 from pygatea/master

* re-implements "retagging" action in elisp to get around sed version inconsistencies between platforms
* cosmetics
* mu: allow for searching the mailing-list field (list:/v:)
* configure.ac: fix gtk2/3 test
* configure.ac: remove gtk+2 support (only gtk+3)
* minor
* mug.c: remove gtk2 compat code
* toys/mug: mu-msg-view: add separator
* toys/mug: mu-msg-header-view: use GtkGrid instead of GtkTable