Issue #1959274: Recaptcha misspelled in recaptcha.js.
Issue #1913556: Note that jQuery update may be required in README.
Issue #1943924: Update README paths for D7.
Issue #1927392: Refactor tests used to determine if fallback to Math should be used.
Issue #1927392: Use _recaptcha_test_recaptcha_server() instead of manual check.
Issue #1921794: Better error message when unable to load recaptchalib.
Issue #1908676: Remove references to recaptcha.net from admin pages.
Issue #1826404: Use recaptcha_ajax.js instead of recaptcha.js for AJAX.
Put the call to Recaptcha.create() as a $(document).ready() call to avoid JS error.
Issue #1734956: Test that the reCAPTCHA server is up before asking recaptchalib to verify the user's input.
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