Issues ready to merge

[glena]

Ready on dev: #5, #11, #18 & #22 waiting for merge.
I would be great if you can add a new label "ready"

[glena]

Updated issue #5 (change the way we show the widget, check the registration settings to avoid new accounts are created on social login, fixes several issues related to social registration - ie: with twitter or facebook accounts when there is no email).
issue #11 (now it handle errors when we receive an error or error_message instead of code param)
issue #18 (no comments related to this issue)
issue #22 (moved to an Auth0 specific section instead on general settings)

[mgonto]

Some issues I've found:

• The logo for the Settings doesn't load: https://cloudup.com/cU2_-QJZb4S in http://auth0.hostinazo.com/wp-admin/plugins.php?activate=true&plugin_status=all&paged=1&s=
• No label saying "Changes saved" anywhere after correct save on Settings
• Change the text from the current one to There was a problem with your log in: [text]
• Regarding Inheritance on the widget config:
  • Add an extra Enter before the options https://cloudup.com/c8MXJXoJAHB
  • Set the options to "Yes", "No", "Default Setting"

After this, let's merge :).

Cheers!

[glena]

• Logo: seems that is issue is because the plugin was saved into a directory called wp-auth0-dev instead of wp-auth0. Did you change it? I will change it anyway so it is relative to the wp-auth0 directory instad of the plugins one.
• "Changes saved" Label: done
• Error message: done
• Widget config: done, and added the extra enter to the 3 configurations with radio buttons (It depends on your viewport size how it is shown so I change all of them).

[mgonto]

This looks good now :).

Let me first see the CSS one.