Minor fixes arising from the first practical class of Spring semester 2019. Mainly relating to loading of paramters on first run, and also the integrator of the default controller

Small changes to the picker controller for paramter loading, and to Flying agent GUI for units of the yaw error

Convert all occurances of PPS Client to Flying Agenet Client. And adjusted all other occurances of PPS accordingly

Picker controller working nicely (on laptop 4) and code commented with simple explanation of what to do

Added squat functions to picker and connected to GUI button. Also added parameters for object thickness at pickup and put down locations

Added files for Picker node and integrated into student GUI, PPSClient, and Paramter service, needs testing