makes the login experience a bit friendlier to non-developer users

this allows tag values to contain spaces, which is up to your own micropub server to handle appropriately.

closes #95 and replaces #96

closes #67

allows backdating and future-dating posts

* shows reply context of the URL you're replying to
* autocomplete nicknames from the post when replying
* moved debug info to the settings screen to clean up the UI

fixes #9

fixes #42

fixes #48

* looks for a media endpoint in the micropub config
* if media endpoint is available, both the note interface and the editor will upload files to it instead of posting the photo directly
* the note interface autosaves in-progress notes in localstorage

The -moz one was an invalid property too.

Firefox picks up the last defined icon PNG for the add to
homescreen feature - https://bugzilla.mozilla.org/751712

* it sometimes confuses web servers to have a folder named "editor" while also serving routes with the same name
* dropped appcache stuff since it wasn't working super well
* add nginx config to the readme

Closes #11

Quill corrects the photo rotation based on exif data since iOS tends to take landscape photos and set the rotation bit when holding it in portrait mode.

made a nice looking dropdown menu for the publish button