Prepare 4.15.1 release

NEWS

+4.15.1
+======
+- Fix stray double-quote in bash-completion PKG_CONFIG invocation
+- Disable parallelism on all tests
+- Adds new README.md and updates AM_INIT_AUTOMAKE
+- xfconf-cache: Fix access to freed data (#16)
+- Translation Updates: oc, he, hu, hy_AM, lt, sk, sq, ug, tr.
+
 4.15.0
 ======
 - Implement custom test driver

configure.ac.in

@@ -11,10 +11,10 @@ m4_define([libxfconf_verinfo], [3:0:0])
 m4_define([libxfconf_version_api], [0])
 m4_define([xfconf_version_major], [4])
 m4_define([xfconf_version_minor], [15])
-m4_define([xfconf_version_micro], [0])
+m4_define([xfconf_version_micro], [1])
 m4_define([xfconf_version_nano], [])
-m4_define([xfconf_version_build], [@REVISION@])
-m4_define([xfconf_version_tag], [git])
+m4_define([xfconf_version_build], [])
+m4_define([xfconf_version_tag], [])
 m4_define([xfconf_version], [xfconf_version_major().xfconf_version_minor().xfconf_version_micro()ifelse(xfconf_version_nano(), [], [], [.xfconf_version_nano()])ifelse(xfconf_version_tag(), [git], [xfconf_version_tag()-xfconf_version_build()], [xfconf_version_tag()])])
 
 m4_define([xfconf_default_debug], [ifelse(xfconf_version_tag(), [git], [yes], [minimum])])