Add parameter for interpolation mode to texture

[hobbeshunter]

For my use case it's useful to be able to set the interpolation mode.

[robertosfield]

It may be better to just get the Sampler after construction, or pass in the Sampler rather than pass in a subset of the settings. If we do the later there is always the chance that someone else we will to set another setting and want to add more to the constructor.

[hobbeshunter]

Sounds reasonable. I'll try to pass in a sampler to the constructor as soon as I find time.

[hobbeshunter]

@robertosfield is this better?

[robertosfield]

Looks good. Now merged.

[hobbeshunter]

Thanks