Add sample data licensing file

src/test/resources/images/README_SAMPLE_DATA_LICENSING.txt

@@ -0,0 +1,21 @@
+============================================================================
+The files sampledata_pageN.jb2 and sampledata.jb are included subject to the 
+following terms: 
+============================================================================
+
+	The compliance checking files provided with this package contain 
+	information which has been extracted from Recommendation ITU-T T.88 
+	"Information technology – Lossy/lossless coding of bi-level images" 
+	(2000/02) of the International Telecommunication Union (“ITU Information”),
+	as found in http://www.itu.int/rec/T-REC-T.88-200002-I/en.
+
+	The extraction and use of ITU Information has been made under license 
+	from International Telecommunication Union (“ITU”), which owns all property
+	rights (including intellectual property rights) to Recommendation ITU-T 
+	T.88 (2000/02). This ITU Information is made available to everyone for free
+	and	may be used for non-commercial purposes; for any other use please 
+	contact	ITU at [email protected]. The sole responsibility for extracting the 
+	ITU Information and the responsibility for any errors or deficiencies in 
+	the	package lies exclusively with the Apache PDFBox project. ITU is not 
+	involved in	the development of the package or the extraction and use of 
+	ITU Information	contained therein.