aws blog post/general site updates

@yudiatsfdc For review. Unfortunately the syntax highlighting that you had in the code in taaas is not as nice here... I've spent a good chunk of the day trying to fix that but I thought it'd be better to get this out and then continue working on that. As far as I can tell we don't have any CSS for formatting code so that might be a larger task for me.

I also updated the sidebar so it's split into Informational posts and Release posts (which will hopefully make the informational posts easier to find). Last, I fixed the image filepaths in the blog posts because they were broken before.