[tomboy] NEWS: update for 1.15.7 release

[Alex Tereschenko <alexter src gnome org>]

commit 6f031efb7e5a905704ef6ee877f5240a3b0a4a86
Author: Alex Tereschenko <frozen and blue gmail com>
Date:   Sat Feb 4 14:54:36 2017 +0100

    NEWS: update for 1.15.7 release
    
    Signed-off-by: Alex Tereschenko <frozen and blue gmail com>

 NEWS |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index 2764dd0..ed9c0c7 100644
--- a/NEWS
+++ b/NEWS
@@ -1,7 +1,7 @@
 Tomboy NEWS
 
 Copyright (C) 2004-2009 Alex Graveley <alex beatniksoftware com>
-              2005-2016 Tomboy Contributors
+              2005-2017 Tomboy Contributors
 
 Please send questions and suggestions to
 <tomboy-list lists beatniksoftware com>.
@@ -9,6 +9,17 @@ Please send questions and suggestions to
 Please report bugs using GitHub
 (https://github.com/tomboy-notes/tomboy/issues).
 
+Version 1.15.7
+* Translation updates: da, sv, es, pt_BR, ca, pl
+* Added "ircs" to the list of known URI schemes,
+  "ircs://" URLs are now clickable (gh29)
+* Made the default search highlight match color lighter
+  and added an option to set a custom one (gh33, bgo748661)
+* Fixed startup crash on Windows when GTK# 2.12.42 is used
+  by updating our copy of Mono.Addins to 1.3.2 (gh34).
+  This also bumps up the target .NET profile in all projects to 4.5 from 4.0.
+* Minor build/project files updates and cleanup
+
 Version 1.15.6
 * Translation updates: pl, lt, sr, sv, cs, hu, da, pt, pt_BR, de, fr
 * Multiple build infrastructure updates and general cleanup