Echo support

[malberts]

Fixes: #3 Fixes: #83 Fixes: #90

[s7eph4n]

When introducing new components, remember to also update https://github.com/ProfessionalWiki/chameleon/blob/master/layouts/layout.rng It is admittedly not straight-forward, but it allows to check that a layout file is at least formally correct.

[malberts]

Thanks for reminding me. I saw that file and was wondering about how to update it. Is there a specific tool you used before, or do you edit it by hand?

Edit: I found a command line tool jing to validate the .rng file. I will edit it by hand and make sure it passes that validation.

[s7eph4n]

I always edited it by hand. I don't know if there is an editor available.

[malberts]

@s7eph4n I updated layout.rng. Does that look about right?

[s7eph4n]

I think it looks good. 👍

[malberts]

@JeroenDeDauw I rewrote a bunch of the code here. Primarily to simplify it and hopefully also to improve the code a bit.

Changes:

• Removed the standalone EchoIcons component. Nothing else gets this special treatment and it's more code to maintain. If somebody ever asks for this I'll look at it again
• Consistent defaults and options for standalone and Navbar PersonalTools
  • Standalone PersonalTools can show icons or links
  • Navbar PersonalTools can show icons next to the dropdown, or links in the dropdown
• Default behavior is to show the icons, since that is how Echo works by default (the links mode was a hack due to the icon support being broken previously)

I'm not going to make big changes again. If the code is fine I'm going to start the 3.2.0 release after merging.

[JeroenDeDauw]

Needs a rebase

[malberts]

Rebased. Do you want me to squash the commits further?