add test cases for path merge and other data clean patterns
diff --git a/genomix/genomix-pregelix/data/graphbuild.test/read.txt b/genomix/genomix-pregelix/data/graphbuild.test/read.txt
new file mode 100755
index 0000000..bd5f3c4
--- /dev/null
+++ b/genomix/genomix-pregelix/data/graphbuild.test/read.txt
@@ -0,0 +1 @@
+1	AATAGAAC