Document ability to use instance profiles

Update travis badge to travis-ci.com

y'all migrated from .org

Fix verify WP CLI command

Fix typo in readme

Fix IMagick with s3 compat

Fix delete files on delete attachment

Don't include tests in the downloadable composer package

It's possible to remove the `tests` (and some other files) from the git archive that composer downloads from github on install. This saves a few MB as we have test images / pdfs and videos in our tests directory

In WordPress 4.9.7, attachment file deleting changed again, which mangles the s3:// paths very badly. What's more, there's no hooks to be able to adjust / change this behaviour. More details in the code comment.

Remove composer deps

In some cases (it's not that clear how) Imagick is not compatible with remote streams. According to the docs, this has never been possible, but I think it happened to work in the past. I've tried the same version of imagick, on different sets and sometimes works, some times doesnt. The crux of the issue is that IMagick tries to read from the stream, and is sending a SEEK request to something near PHP_MAX_INT, which causes memory allocation issues on our stream wrapper. It's maybe possible to work around it with a seek stream guard, but really I think that's just one of many possible issues. I think it's going to be better to let IMagick always work with local images to avoid issues.

I think for v2 we should remove the composer deps from the master branch, and tagged version should be from that branch. THis means installing the plugin via composer won't cause additoinal copies of the AWS SDK to exist.

We can still have a build branch, and upload artifacts to the release page I believe, for people who want to use the plugin without composer.

Remove upload-attachments WP CLI command and fix upload-directory

Improvement to the custom endpoint docs

Add docs for configuring a session token

This a frequently asked question and there are multiple PRs for the feature.

Readme: small fix for the syntax highlight

Update README.md

`upload-attachments` is pretty useless, as it requires _all_ media files be in the attachment metadata, which isn't a great assumption. REally upload-directory is much more prefered and simpler. ASs it happens, that's be broke for quite some time, so finally fixing it!

Fixes #254, #130, #100, #266, #269, #147

Update README.md

Following #284

Stream metadata stub method for local wrapper

Update docs for bucket path prefix

how to use directory path prefix

Include an example of how to use directory path prefix with bucket name.

Trigger putObject action on local wrapper as well