Add AverageCoverage to graph construction(hadoop) and make graphviz more pretty
diff --git a/genomix/genomix-pregelix/data/result/P4ForMergeGraph/txt/2 b/genomix/genomix-pregelix/data/result/P4ForMergeGraph/txt/2
new file mode 100755
index 0000000..f00dc00
--- /dev/null
+++ b/genomix/genomix-pregelix/data/result/P4ForMergeGraph/txt/2
@@ -0,0 +1 @@
+AAT	{[(1-1_0)]	[]	[]	[]	[]	AATA}