Command line processing, ortho mode & others

[yuckinus]

Command line processing:
- raw viewer / can handle folders
- session viewer and step2 / can handle mjs (through command line or open with command)
- step3 / can handle mjp files (through command line or open with command)
- all above and step1 / add -h, --help, /h, /? command line parameter help
* this was the apps can be associated as default open apps for given filetypes

Ortho mode:
- all / ortho mode used left mouse button for panning while 3D used right, fixed so both use same buttons
- all / add rotate posibility
- all / fixed minor issues, made minor optimizations
- all / activate compass in ortho to show rotation

Others:
- raw viewer / switched from open files to open folder, kept open files as suboption
- all / fixed mouse sensitivity dependency for keyboard rotation, sped up keyboard translation