A stupid simple captcha service using svg-captcha
Throw a GET request at /captcha, this returns an svg tag describing the captcha.
Throw a GET request at /captcha/check?ip=[]&solution=[], filling in the query parameters. This will return a success
json string, giving a bool describing it's success status. The user has 2 minutes to solve the captcha before it is
removed from the database, from which the user would have to request a new captcha.