fixed CrazyRadio crash on shutdown, fixed RateCommand.msg (according to Dusan's code), removed timers from PPSClient, still fucking around with SafeControllerService

reverted CrazyRadio, fixed PPSClient and fucked around with SafeControllerService. Also modified .gitignore to ignore all pyc files.

created dummy file to let git make an include directory in the d_fall_gui package, as is would not compile otherwise

solved directory problem by adding INCLUDEPATH += 3450PWD/include to CrazyFlyGUI.pro. Now we can freely choose where to locate header and source files for GUI

Added src and include, made GUI compile with QtCreator stuff, to keep the development going. Need to add compilation with ROS stuff, catkin_make

safeRateCommandPkg added as Output from safeController. This gets then pubslished via callbackRateCommand.

added area and controlleroutput structs to PPSClient for testing; added CentralManagerService to launch file

Publishers and callbacks to send data to crazyradio.py added to PPSClient.pps; Crayzradio node added to ppsLaunch.launch; Subcriber added to Crazyradio.py which successfully subscribes to motorCommand even if no cf is connected.

studentParams.yaml added that will be used by students to change their crazyflie, etc

PPSClient.cpp changed: gets data from ViconDataPublisher and extracts data according the chosen crazyflie. TODO: connection with controller