ApiResource useless for some requests

[theluk]

For example

1. Template preview. You cannot use the unwrapped template apiresource, because it should be a post and create function does not support $resourcePath. The only workaround is setting the endpoint explicitly and then resetting it
2. All api POST and UPDATE calls that expects a query string parameter, as the ApiResources create and update functions simply omit the query string option.

[theluk]

even a custom class extending ApiResource is not possible as you declared the callResource as private ... -.-

i hoped the migration from mandrill would be a little bit more easy, but it breaks at the most basic tools...

[richleland]

The work we are doing in the 2.x branch will address this issue.

[richleland]

Handled in 2.x branch via #121 and #122.

[richleland]

2.0 has been released: https://packagist.org/packages/sparkpost/sparkpost