Fixed SDL TTF lag.

TTF was lagging up after a while so switched to using Solid rendering instead of Blended, which ate tons of CPU. Memory hole's lessened, though still eluding me. I think it has something to do with SDL rather than the physics.c program. Also, you can freely take physics.c away and use it by itself, just need to have the headers in cluded and a pointer spawned in your main program as data* (name) and pass the memory to the physics.c function. I still need to make a parser to read data off of a file. Compiling every time is irksome.