2.1.0

• New: an Activity panel on the settings screen. It answers the question an invisible captcha cannot answer on its own - is this thing working? Two figures come from your own site (submissions verified, submissions turned away) and one from captchaapi.eu (how much of your account's monthly allowance is gone). They are kept apart on purpose: a challenge that is issued and never submitted counts for the service and not for your site, so adding them together would produce a number that means nothing.
• When the service says it cannot issue challenges, the panel leads with that rather than with the figures. Account totals lag live traffic by up to fifteen minutes, and "4,800 of 5,000" reads as headroom to a site whose forms are already being turned away.
• Every protected form now carries a single line reporting whether the protection is running - WordPress core, WooCommerce including the checkout, and all seven supported form plugins. There is no puzzle and no checkbox to see, so until now neither you nor your visitors had any sign the plugin was working. It draws no box and no background, and each form gets its own: a WooCommerce account page shows one under the login form and one under the registration form.
• Optional: the same line can carry our logo and a link to captchaapi.eu. That is a credit on your public pages, so it is off unless you choose it under Settings -> captchaapi.eu.
• Both can be turned off entirely.
• The captchaapi.eu widget script is no longer stamped with the plugin's version number. It is the service's file on the service's release schedule, and tying it to ours meant a browser kept the build that shipped with your plugin version until the next plugin update.