djcb/mu — pull request #529 by davidcsterratt (2014-12-01 12:26:50+00:00)
Title: Allow mu4e-bookmarks to contain lisp expressions

This allows expressions such as:
```
((concat "maildir:/inbox date:"
(format-time-string "%Y%m01"
(subtract-time (current-time) (days-to-time 28)))
"..")
"Last calendar month"
"m")
```
which allow me to look at the last calendar month (i.e. starting from the 1st of the month).