Save/load trial improvements

[NicerNewerCar]

• Adds Two new optional keywords to the trial loader
  • TrackingFolder -> Specifies the folder containing the tracking .tra files
    • Defaults to Tracking if the keyword is not present
  • FilterFolder -> Specifies the folder containing the filter .vie files
    • Defaults to xParameters if the keyword is not present
• Adds support for loading multiple filter files (ie. one for each camera)
• Closes Customization of default paths #150

Version 1.1

TrackingFolder MyTrackingFolder
FilterFolder MyFilterFolder

# The normal CFG file would continue here

TODO

• Sync filter files with name of camera -> similar to what is done with tracking files
• Update the trial creator in the UI to allow for the specification of the tracking/filter dirs
• When Crtl+S is hit save everything rather than just the tracking
  • Since loading a trial loads everything I think it makes sense to have the save trial save everything
  • Save .cfg
  • Save .vie for each camera
  • Save .tra for each volume
• Crtl+Shift+S will remain Save as but again will save everything too