Added SciChart to list of commercial charts

[andyb1979]

Checklist:

• [x] I've read and understood Contributing Guidelines.
• [x] I've added the new resource at the end of its section.
• [x] This resource is out there for a while, and actively maintained.
• [x] This resource is popular enough and has at least a few hundred stars on GitHub.

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I've added SciChart, which is a commercial chart control with a free version for personal use, non-profit or educational use, to the list of commercial chart libraries.

Why SciChart should be included:

(i) Incredible fast, feature rich for complex enterprise applications (ii) Popular, achieving high ratings in third party reviews (iii) Company has been around for > 10 years

thank you!

[Ashe-reset]

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