Mods/Particles Stress Testing

A way of testing how many particles FSO can handle without slowdowns. There are two test missions, Stress Test 1 and Stress Test 2, which can be accessed from the tech room. Each mission consists of groups of fighters which, when detonated, will produce large numbers of 15-frame 128x128 particles. Stress Test 1 has test groups ranging from 1k to 10k. Stress Test 2 goes from 10k to 100k.