Release 1.5.7

Review URL: https://codereview.appspot.com/96800043

configure.ac

@@ -26,7 +26,7 @@ m4_define([ibus_released], [1])
 
 m4_define([ibus_major_version], [1])
 m4_define([ibus_minor_version], [5])
-m4_define([ibus_micro_version], [6])
+m4_define([ibus_micro_version], [7])
 m4_define([ibus_abi_current], [5])
 m4_define([ibus_abi_revision],
           [m4_eval(100 * ibus_minor_version + ibus_micro_version)])