adding Week 4 material

...ureCodeExamples/Week4/AsyncAwaitCode/asyncWaitGetJSON1.js

...ureCodeExamples/Week4/AsyncAwaitCode/asyncWaitGetJSON2.js

lectureCodeExamples/Week4/AsyncAwaitCode/getJSONProblem.js

...ples/Week4/AsyncAwaitCode/node_modules/.package-lock.json

...s/Week4/AsyncAwaitCode/node_modules/node-fetch/LICENSE.md

...es/Week4/AsyncAwaitCode/node_modules/node-fetch/README.md

...s/Week4/AsyncAwaitCode/node_modules/node-fetch/browser.js

...k4/AsyncAwaitCode/node_modules/node-fetch/lib/index.es.js

...Week4/AsyncAwaitCode/node_modules/node-fetch/lib/index.js

...eek4/AsyncAwaitCode/node_modules/node-fetch/lib/index.mjs

...Week4/AsyncAwaitCode/node_modules/node-fetch/package.json

...xamples/Week4/AsyncAwaitCode/node_modules/tr46/.npmignore

...eExamples/Week4/AsyncAwaitCode/node_modules/tr46/index.js

...mples/Week4/AsyncAwaitCode/node_modules/tr46/lib/.gitkeep

...k4/AsyncAwaitCode/node_modules/tr46/lib/mappingTable.json

...mples/Week4/AsyncAwaitCode/node_modules/tr46/package.json

...AsyncAwaitCode/node_modules/webidl-conversions/LICENSE.md

.../AsyncAwaitCode/node_modules/webidl-conversions/README.md

...yncAwaitCode/node_modules/webidl-conversions/lib/index.js

...yncAwaitCode/node_modules/webidl-conversions/package.json