Completed redevelopment of the Flying Agent Client and GUI, and the Default Controller

See merge request D-FaLL/PandS-System/D-FaLL-System!11

Fixed abs() int casting causing errors for default controller state changes. Added integrator to default controller. Needs testing and adding buttons to GUI for run integrator and reset integrator.

Default controller compiles and is tested. Once remaining discrepancy is that the default controller switches into integrator mode too early

Finished implementing the Default controller (except for the integrator). Needs compiling and testing. (Also changed the ClientConfig.yaml to be FlyingAgentClientConfig.yaml)

Now compiles in ROS. Flying agent cleint seems to work well with the new structure. Default controller still needs implementing

Mostly finished with converting the Flying Agent Client to the Default controller. Needs comoiltion testing. Next step is to make the Default controller able to perform take-off and land manoeuvres

Add bits and pieces to the Slying Agent client for checking availability and occulsion of mocap data. Needs compiling and teesting

Started process of converting the Flying agent client from the safe controller to the default controller, and streamlining things at the same time. Currently compiles and flys, but needs cleaning up and proper implementing of the take-off and land functions.

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

Renamed launch files to begin with a lowercase letter to make it easier for typing into the command line

Updated wiki and install folders for the change from pps_ws to dfall_ws, and from d_fall_pps to dfall_pkg

Fix to C make list for the naming of the flying agent and system config GUIS (the first letter needed to be captialised)

Started process of adding a template controller. Still need to connect the GUI elements and add the ROS Controller Service node

Remove the StudentGUI because it is was not updated to the new node naming convention and because it was re-factored as the FlyingAgentGUI

Merge branch 'add_battery_monitor_node' of gitlab.ethz.ch:D-FaLL/PandS-System/D-FaLL-System into add_battery_monitor_node
Forgot to pull before committing

Removed the command all buttons from the System Config GUI. Also removed the get yaml paramters functions and pointed to the overall class. Needs to be tested for ROS compilation

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