Add more functions to the api

[barart]

So in resume, (something that is not precisely specified on the docs) atm of write this, the api only allows you to:

• Create and Destroy Session
• Retrieve all subscriber lists
• Retrieve the info of a single list
• Delete a list
• Retrieve the subscribers of a list
• Add a subscriber

although the api is a great step in phplist its current functions/calls are very very reduced and of low usability

I would like to ask more functions/calls that make the api a little more functional like:

• Create a list
• Add subscribers to a list
• Remove subscribers
• Remove subscribers from a list
• Run a list/campaign

And other calls/functions that make more usable the Api

Thanks in advance

[oliverklee]

@barartm, I'd love to see those new features! Would you be willing to create a pull request for one of them?

[ramonfincken]

Also see PR to add subscriber to list #129