Add support for ssl methods

[philipmat]

ssl - https://www.sandbox.namecheap.com/support/api/methods.aspx

• [ ] create — Creates a new SSL certificate.
• [ ] activate — Activates a newly purchased SSL certificate.
• [ ] getInfo — Retrieves information about the requested SSL certificate
• [ ] parseCSR — Parsers the CSR
• [ ] getApproverEmailList — Gets approver email list for the requested certificate.
• [ ] getList — Returns a list of SSL certificates for the particular user.
• [ ] renew — Renews an SSL certificate.
• [ ] resendApproverEmail — Resends the approver email.
• [ ] resendfulfillmentemail — Resends the fulfilment email containing the certificate.
• [ ] reissue — Reissues an SSL certificate.
• [ ] purchasemoresans — Purchases more add-on domains for already purchased certificate.
• [ ] revokecertificate — Revokes a re-issued SSL certificate.
• [ ] editDCVMethod — Changes domain control validation (DCV) method of the requested certificate