update readme

Author: lmh921000132974

groundtruth/README.md

@@ -1,7 +1,9 @@
 README
 ------
-## Ground Truth
-This sub-directory matches the Section IV-C of the corresponding paper.  
-"groundtruth.txt" is the libraries that we extracted from the 1000 sample apps manually.  
-Folder "/libD" contains the total libraries that LibD has found in the 1,000 samples and comparison result with the groundtruth.  
-Folder "/libRadar" contains the total libraries that LibRadar has found in the 1,000 samples and the comparison result with the groundtruth.  
+###Introduction:
+This sub-directory contains the ground truth libraries, LibD detection results, and LibRader detection results for the 1,000 sample apps in Section IV-C.
+
+###File list: 
+	./groundtruth.txt: the libraries extracted from the 1000 sample apps as the ground truth.
+	./libD/*: the total libraries that LibD has found in the 1,000 samples and comparison result with the ground truth.  
+	./libRadar*: the total libraries that LibRadar has found in the 1,000 samples and the comparison result with the ground truth.