Initial commit for documentation

- Added documentation for esriNS, graphicsUtils, request.
- This is a test for future pull requests. I wanted to see how you like this to work. I can do a pull request for each class or namespace to make detecting changes easier. Or, I can do the whole file at once (I don't think that's a good idea).
- Also, you'll notice that some lines are changed because of style changes (ex: line 16 is removed even though it's the same as line 19 in the new file). I'm trying to not change the style, but Visual Studio is not very helpful.