Add ability to set ssl verify to false

[rhass]

I am not sure why anyone would want this to be in the gem. This seems like a bad idea.

[moul]

@rhass we are working to get "API sandboxes" so people can test their library on a mock that may run without proper certificate

As soon as this is optional and enforced to ssl_verify=true by default, it should not add any extra security issue for standard users of the library