added a function in alignment_util.py; to support a new visualization input format
added a function in alignment_util.py; to support a new visualization input format

yang1fan2/nematus,EdinburghNLP/nematus,shuoyangd/nematus,yang1fan2/nematus,shuoyangd/nematus,rsennrich/nematus,yang1fan2/nematus,yang1fan2/nematus,rsennrich/nematus,EdinburghNLP/nematus,cshanbo/nematus,cshanbo/nematus,yang1fan2/nematus,yang1fan2/nematus,rsennrich/nematus,cshanbo/nematus,cshanbo/nematus,EdinburghNLP/nematus,Proyag/nematus,yang1fan2/nematus,Proyag/nematus,yang1fan2/nematus,cshanbo/nematus,yang1fan2/nematus,Proyag/nematus,Proyag/nematus,EdinburghNLP/nematus,yang1fan2/nematus,rsennrich/nematus,shuoyangd/nematus,rsennrich/nematus,cshanbo/nematus,Proyag/nematus,shuoyangd/nematus,EdinburghNLP/nematus,shuoyangd/nematus,EdinburghNLP/nematus,shuoyangd/nematus,rsennrich/nematus,Proyag/nematus