I had a thread about this and it seems to be gone. Weird!
So a simplified way to add the CBT support to your Arduino installation is by adding this custom URL to your settings and installing the lib via the Boards Manager.
Load up Arduino and head to Preferences. Then in the field marked "Additional Boards Manager URLs" add this URL:
Press ok to close the window.
Then go to Tools > Board > Boards Manager
In the filter just type CANBus and you should see the CANBus Triple library. Click install and you're good to go!