Create a mock reddit API that responds to only three canned reddit query strings

[Noni212]

Three reddit query strings: "Query," "Modification 1," and "Modification 2."

For each, have the mock API return a static list of reddit post IDs

• run the three mock queries once against the reddit API to get lists of first, say, 50 results for each and save these for the demo

Have the static list for "Modification 1" include some new IDs not returned for "Query" and have it exclude some that were returned for "Query." Similar for Modification 2.