Updates for release

NEWS

+4.15.7
+======
+- libxfce4ui now needs libxfce4util >= 4.15.6
+- Update configure.ac.in syntax
+- Namespace of the gir needs capital first letter
+- Remove hardcoded translators list
+- Bump libepoxy version to 1.2
+- Translation Updates:
+  Portuguese (Brazil), Slovenian, Swedish
+
 4.15.6
 ======
 - Introduce xfce_spawn and xfce_spawn_command_line

configure.ac.in

@@ -9,10 +9,10 @@ m4_define([libxfce4ui_verinfo], [0:0:0])
 m4_define([libxfce4ui_version_api], [2])
 m4_define([libxfce4ui_version_major], [4])
 m4_define([libxfce4ui_version_minor], [15])
-m4_define([libxfce4ui_version_micro], [6])
+m4_define([libxfce4ui_version_micro], [7])
 m4_define([libxfce4ui_version_nano], []) dnl leave this empty to have no nano version
 m4_define([libxfce4ui_version_build], [@REVISION@])
-m4_define([libxfce4ui_version_tag], [git])
+m4_define([libxfce4ui_version_tag], [])
 m4_define([libxfce4ui_version], [libxfce4ui_version_major().libxfce4ui_version_minor().libxfce4ui_version_micro()ifelse(libxfce4ui_version_nano(), [], [], [.libxfce4ui_version_nano()])ifelse(libxfce4ui_version_tag(), [git], [libxfce4ui_version_tag()-libxfce4ui_version_build()], [libxfce4ui_version_tag()])])
 
 m4_define([libxfce4kbd_private_verinfo], [0:0:0])