fix file size in test-mu-guile.scm changed by e97ec2d5

Signed-off-by: Chirantan Ekbote <chirantan.ekbote@gmail.com>
Merge pull request #231 from jynnantonix/guile-test

* fix file size in test-mu-guile.scm
* try harder to match special strings
* configure.ac: report on guile version
* update some unit tests
* minor
* mu-str: treat '..' in non-range fields differently
* lib: mu date: better handling of date fields in newer xapians
* mu4e: fix a few compiler warnings / typos
* mu4e: fix typo in Makefile.am
* mu-query: better handle empty lhs/rhs in date intervals
* mu4e: fix mu4e-message
Document what happens if either the left or right part of a date range
is omitted.