Import FIT files from Garmin Edge 500

Added Support for the Garmin FIT file format. This is the new data storage format for the Garmin Edge 500 and newer devices.
To synchronize your Edge data with TrailRunner follow these steps:

- Set TrailRunner > Preferences > Synchronize > Helper Application to Garmin USB Mass Storage
- In the Main document toolbar, click on the Import from device icon.
- An import pane should now open on the left, decoding and displaying your stored activities.