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
Corrections to el-GR translation

some minor corrections
Merging el-GR
Fix to el-GR translation

@access-denied this is for consistency with the other languages.

I acknowledge that there it’s a problem at the moment that languages
can’t expose a localised name; it would make more sense to use the
localised language name in the menu.
Use Greek translation in introduction edition
Tweaks "Tiddlers" docs

Thanks for the prompt @FND - I’ve pushed this version to
http://tiddlywiki.com/#Tiddlers and
http://tiddlywiki.com/static/Tiddlers.html
disable enqueueTiddlerEvent during plugin switching
Extend Cecily

Two new features: you can set the tiddler width via an attribute on the
list widget, and specify a rotation factor in the map.
Updates to "introduction" edition
Merge branch 'pr/1034'
Merge pull request #1025 from xcazin/trans

Spotted thanks to http://tiddlywiki.com/prerelease/editions/translators/index.html