Fixed link in tutorial 1.2
Fixed link in tutorial 1.2

Zhong-Lab-UCSD/Genomic-Interactive-Visualization-Engine,Zhong-Lab-UCSD/Genomic-Interactive-Visualization-Engine,Zhong-Lab-UCSD/Genomic-Interactive-Visualization-Engine,Zhong-Lab-UCSD/Genomic-Interactive-Visualization-Engine,Zhong-Lab-UCSD/Genomic-Interactive-Visualization-Engine,Zhong-Lab-UCSD/Genomic-Interactive-Visualization-Engine