Log Message:
Update to 1.2.20150920:

2015/09/20
	+ decrease table value for minimum number of arguments for the widgets
	  which use --no-items option (report by Raven Singularity).
	+ update configure macros:
	  + use $SHELL consistently, deprecate non-POSIX shell
	  + PKG_CONFIG may simply be unset - fix
	  + add option to allow changing ABI version, from ncurses6.