a couple of changes (outlined below)

1. changed incTime fn in uavState class to take in 1 instead of deltaT,
since we were only every increasing the time by units on 1
2. the survey function now takes in a uav as well as a map and the
starting and ending locations
3. changes the survey function so that it has it's own local coordinate
system
4.  made isEven function simpler
5. changes user input to just data entry into the code (didn't want to
input the numbers every time i ran the sim...)