Greek translation

First attempt for translating Greek (Greece)
Corrections to el-GR translations

Some minor corrections to translations.
fr-FR translation of the core plugin readme
fr-FR translation of the hint about external tiddlers
fr-FR translation for the unpackplugin command help
fr-FR translation for the editions command help
Lazy loading should be forced for indexing also
Add canned filter for recent system tiddlers

Useful when you need to establish the titles of tiddlers being used for
state storage.
Make tag pills rounder

The tag pills were looking less like pills at larger font sizes,
because of the absolute units used for the corner roundness.
Remove extraneous console.log
Release note update
First pass at new introduction edition

It started life as the slides for a new introductory video, but I’m
thinking that it may be worth publishing as an interactive introduction.
Merge pull request #1026 from andrey013/lazy-loading-indexed-transclusion

Lazy loading should be forced for indexing transclusion
Update docs
Add link to TiddlyWiki guide FR
Updates to introduction edition
Add direct link to github ribbon plugin

The former documentation referenced a plugin but left no easy way to
link to it. Also, the misleading text claiming a title also confused me.
I had to do some creative greping the git files to hunt it down.

Adding a TiddlyWiki link around the plugin links to the actual tiddler
that a reader could easily copy. This also deprecated the need for the
misleading title.
Wrap page control previews in position:relative

Fixes #1031
Merge pull request #1032 from sukima/feature/github-ribbon-plugin-link

Add direct link to github ribbon plugin
Corrections to el-GR translation

some minor corrections