Shall we change the intro guide since acmephp client deprecated the step by step command?

[xiaohuilam]

acmephp.github.io/index.html

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	<span class="comment"># Register your account key in Let's Encrypt</span>
	<span class="dollar">$</span> <span class="acmephp">php acmephp.phar</span> <span class="command">register</span> <span class="arguments">[email protected]</span>
	<span class="comment"># Prove you own the domain "mydomain.com"</span>
	<span class="dollar">$</span> <span class="acmephp">php acmephp.phar</span> <span class="command">authorize</span> <span class="arguments">mydomain.com</span>
	<span class="comment"># Ask the server to check your proof</span>
	<span class="dollar">$</span> <span class="acmephp">php acmephp.phar</span> <span class="command">check</span> <span class="arguments">mydomain.com</span>
	<span class="comment"># Get the certificate!</span>
	<span class="dollar">$</span> <span class="acmephp">php acmephp.phar</span> <span class="command">request</span> <span class="arguments">mydomain.com</span>
	<span class="comment"># To renew, re-run "php acmephp.phar request mydomain.com"</span>
	<span class="comment"># Pro-Tip: configure a CRON to renew automatically!</span>