D-6

v-1.0
---
1. Re-build executable
	=> done
D-7(D-6)

v-1.0
---
1. background color

	=> done
D-7

v-1.1.0
---
1. merge direction: get option value

	=> done
D-7

v-1.1.1
---
1. merge  => vertical

	=> done