use standard path for default background directory. bump version for release.

configure.ac

@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 
-AC_INIT(lightdm-webkit2-greeter, 2.1.0rc3)
+AC_INIT(lightdm-webkit2-greeter, 2.1.0)
 AC_SUBST(THEME_DIR)
 AC_CONFIG_HEADER(config.h)
 AC_PREREQ([2.59])

data/lightdm-webkit2-greeter.conf

@@ -18,4 +18,4 @@ debug_mode = false
 [branding]
 logo = /usr/share/lightdm-webkit/themes/antergos/img/antergos.png
 user_image = /usr/share/lightdm-webkit/themes/antergos/img/antergos-logo-user.png
-background_images = /usr/share/antergos/wallpapers
+background_images = /usr/share/backgrounds