#37 Add ability to generate 2048 and 4096 SSL CSR

[MasterM]

Presently Adito generates a 1024 CSR but many of the CA's no longer generate 1024 Certificates. They all prefer to do 2048 or 4096 Certificates. The ability to generate 2048 or 4096 CSR's or import a 2048 or 4096 key would be nice