[evolution-ews] Sync version with GNOME 3.15 series

[Milan Crha <mcrha src gnome org>]

commit 370fd0f36ac4cc6ec6c7b5acd43bd0ec4459affb
Author: Milan Crha <mcrha redhat com>
Date:   Mon Mar 2 08:13:34 2015 +0100

    Sync version with GNOME 3.15 series

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 2404ae1..a10d375 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 dnl Evolution-EWS version
 m4_define([ews_major_version], [3])
-m4_define([ews_minor_version], [13])
+m4_define([ews_minor_version], [15])
 m4_define([ews_micro_version], [91])
 
 m4_define([ews_version],