Document a quick start guide for AspireUpdate users

[asirota]

Overall parts:

1. Where to get AU
2. How to install AU
3. Standard operation (uses w.org)
4. Rewrite operation (uses api.aspirecloud.org)
5. Debug log options

How AspireUpdate changes the UI when in rewrite mode. (#12)
Link to README for more configuration details

Ample screen shots please

[AmnestyAM]

@asirota @verlev any thoughts on these pages? If you like them Ill do a PR for the branch https://github.com/AmnestyAM/documentation/blob/QuickStartGuides/docs/aspireupdate/quickstart.md and https://github.com/AmnestyAM/documentation/blob/QuickStartGuides/docs/aspireupdate/test.md

[asirota]

@namithj have a look when you have time. I think Austin did a really nice job.

[namithj]

This looks great.

We will have to change the plugin admin page url as it differs between A regular and mu wordpress install.

There are few typos too which we can fix during PR.

For the tests, we have our own error log viewer within the plugin. Probably better to create user instructions based on that.

[AmnestyAM]

thanks for the feedback, are we supporting this as both standard and MU?
Should we have a blueprint that writes the file to the MU directory, I guess that would be more gear towards hosts using the plugin than the general public.

For the error logger, I was seeing that plugin from the playground blueprint, I guess this is a feature in the main branch now.

Thanks again.