initial commit for earth elevation matrix map physics test aka rainflow
got periodic wrapping for position working and also friction forces, updated element to use array of forces and integration to sum over array, and got auto resize working
added root element to physics test and implemented interactive water drops on keydown or mouse click
refactored code into src directory, made drops smaller, and increased friction and dt for drops
checked circletest, polygontest, and dronewar all working, fixed bug in integration.verlet and removed extra force eval
fixed bug in integration.verlet
merged from dev branch and recompiled dronewar