experiments should load dynamically on page from github without page reload

[Vanessasaurus]

This is the largest of the repos, expfactory-experiments:

and compared time for surveys and games (small, more realistically sized repos). Note that selecting an already selected repo (experiments) does not trigger the function:

data structure to parse looks like this:

[Vanessasaurus]

User should be limited (still) to installing 5 at once.