Folder names changed

[cueo]

Changelogs:

• Changed all the the folder names to MM-DD format
• Added a .gitignore file to deal with macOS's notorious .DS_Store
• Updated the announcement README.md

Used the following code:

git mv "01 Sep" 09-01
git add -u 09-01
git commit -m "News Ticker Final, RSS & Atom, and Quiz Snippets"

git mv "03 Aug" 08-03
git add -u 08-03
git commit -m "Introduction Class"

git add -u "08 Sep" 09-08
git add -u 09-08
git commit -m "Making AJAX Calls using jquery & Introduction to Bootstrap"

git mv "10 Aug" 08-10
git add -u 08-10
git commit -m "Asynchronous calls using img and XHR"

git mv "17 Aug" 08-17
git add -u 08-17
git commit -m "Using XML & CORS Basics"

git mv "31 Aug" 08-31
git add -u 08-31
git commit -m "XML, RSS and News Ticker"

git mv "06 Aug" 08-06
git add -u 08-06
git commit -m "Asynchronous calls and Hidden iframe example"

git mv "18 Aug" 08-18
git add -u 08-18
git commit -m "Streaming video & Problem for next class"

git mv "07 Sep" 09-07
git add -u 09-07
git commit -m "Partial Form Upload & Introduction to jquery"

git mv "11 Aug" 08-11
git add -u 08-11
git commit -m "Saving XHR History"

git mv "24 Aug" 08-24
git add -u 08-24
git commit -m "Predictive Fetch & Suggestion Sub-Throttle"

PS: Hacktoberfest 1/4 pull request. Feel free to reject and close. PPS: Your commit messages have been saved

[mohit-surana]

Your patience and hard work will take you miles in your life. Much thanks!