New embed feature - Githubissues

Added embed method to Post scraper. Users can now dynamically get embed HTML for posts.

[x] Have you followed the guidelines in our Contributing document?
[x] Have you checked to ensure there aren't other open Pull Requests for the same update/change?
[x] Have you added an explanation of what your changes do and why you'd like us to include them?
[x] Have you written new tests for your changes, as applicable?
[x] Have you successfully ran tests with your changes locally?

chris-greening / instascrape