Added sizes, height and width Attributes to the PictureSource…

[majortom64]

…Context.

This brings the PictureSourceContext in line with the standard.

[JohnSundell]

Looks great! Now just unit tests needed to get this mergable. Let me know if you want me to help out in any way.

[JohnSundell]

@majortom64 can we close this PR, since these changes are also included in #91? Would make sense to review and merge them all as one change, I think. Then you could implement the unit tests for all new APIs within that PR, if you'd like.

[majortom64]

Trying to steal the glory of a PR from me?!? :-) I am pretty sure I did them as two because they were not part of the component (as they were used by the node), and it meant that they could be added separately.

I am happy to have them all be part of the same PR, but if I have to do something on my end, I need instructions (git/GitHub) are still fairly new to me.

I am almost done with the tests, BTW. Should have it all in today.

[JohnSundell]

@majortom64 No action needed from your side. I'll simply close this PR, and then you'll just push all of your future commits onto your other PR (#91). That is, the PictureComponent branch. No rush from my side, I typically only have time once or twice per week to do open source work, but once you've updated your PR to address the comments and added tests, I'll re-review and hopefully get it merged soon 🙂