Added acquisition camera abstract class and simulator
sim_acquistion.py in bin works
Added acquisition camera to client.py
client.py support for plate_solve.ready()
Adding acquisition camera functionality to update()
Loop in a plate-solve/slew cycle until the target is within reasonable limits of the center of the acquisition frame
Removed randomness from plate solve simulator(it rarely, if ever gives a false positive).  Added randomness to telescope simulator absolute slews(large slews almost never work first try)
Added slew calculations to place target in science camera to update()