add instruction book for branch b1

lilongjie · lilongjie · commit b18106fdbd77 · 2019-02-12T14:55:09.000+08:00
diff --git a/branch-b1.readme b/branch-b1.readme
@@ -0,0 +1,2 @@
+this is instruction book of branch b1
+

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+this is instruction book of branch b1`
	`2`	`+`