MediaWiki - top level meta task

The basic idea is to
* port the Palm Leaf mediawiki instance at [palmleaf.org](http://palmleaf.org/wiki/Main_Page) to small boxes (Nuc, RPI)
* make it available alongside dweb-mirror
* trial in a high school in Bali with minimal internet connectivity

This is a meta-task for this sub-project until/unless the project gets its own tracking space.

High level overview
- [x] Porting to Nuc - see below
- [x] Local integration with dweb-mirror - see #287 (few minor open items)
- [x] Port to RPI - see #294 - failing some tests still - but they re all here now
- [x] Update installer so its less instructions and more actions - see #294 (pretty good but not perfect)
- [x] Integrate IIIF #291
- [x] Image browser #289 - working well using IIIF
- [x] ArchiveOrgAuth is not working #296
- [x] Check on image sizes being downloaded, should be 400px + full-size - see #297
- [x] Minor bugs - probably transient - see below
- [x] Edit - test it - seems to work except for Transliterator
- [x] Transliterator #295 - waiting on readme from David
- [x] update_ia_item.py see below
- [ ] Merging mitra42/mediawiki-extension-archive-leaf back to David's repo
- [x] Links from DA to MW - see #298
- [x] Bug with https://palmleaf.org/transcriber/static/media/zwnj.0da8f3f5.svg see below
- [x] Need to crawl - need list of pages or collection
- Collection=Bali and external-identifier contains //palmleaf.org
- [ ] Figure out S3 keys - #296 at IA - decided to use local accounts #311
- [ ] Link images to local mirror rather than wiki images #313
#### Not now - i.e. Medium to long term or when at IA

- [ ] http://192.168.0.14/favicon.ico - missing on palmleafwiki as well
- [ ] Image browser #289 - copy "stream" UI (alternative to archive.html)
- [ ] Uploading back to palmleaf.org and archive.org - see below and #312
- [ ] Updating from palmleaf.org and archive.org - see below

#### next install
- [x] Installation instructions - see #300 includes tesitng Metrolook and installing ArchiveOrgAuth