updated code to pull in github repos and display them on github tab on main page

[TartarSauce]

The following work was done

• updated the githubToken file and added it to .gitignore
• updated the index.html page to add the templates for the repos section
• added new js files to read the github data, process the github data into html using Handlebars
• rewired the links in index.html so that clicking on github link in main page leads to repos page (using page.js functions)
• updated the index.html file to pull in all the right script files, in correct order
• NOTE - use node server.js at the command prompt to run these files, not live-server.