Initial GPS tab implementation
Fixed some comments and printounts
Merge branch 'gpstab'
Changed to new API
Exit headless client if not input-device connected. Closes #117.
Print error when failing. Closes #118.
Clear plot on connect, not on disconnect. Closes #113.
Fixed typo
Added remove callbacks to param API. Closes #114.
Added basic param API example. Closes #115.
Returns error when no CRTP driver is found or a malformed URI is given. Closes #119.
Added timestamping to written logfiles. Closes #104.
Updated the GPS tab and debug driver for GPS
Corrected error when Marble is not installed
gpstab: Fix accuracy circle, change the projection and remove grid
Support for multiple input-devices with the same name. Closes #94.
Fixed a typo in the experimental linux joystick driver