add script for ploting heatmap for each attention weights matrix in input file.
add script for ploting heatmap for each attention weights matrix in input file.

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