Changed some parameters.
Added models to contour logic and dose difference logic.
Changed GUI and added initial logic for contour calculation.
Added try for reading dose from filename.
Bash script for converting .hed to .nrrd header file.
Changed GUI; removed loading for .ctx and .dos (now loaded with nrrd); Added some contour logic;
Change.
Added int and double.
Fixed some bugs.
Changed some things.
Added vector field functionality.
Added logic for multipling vector field values with spacing.
Misc.
Merged with NRRD branch.