Lots of improvements

• NEW: Command-line arguments (via @augoust)
• NEW: Head/Neck tilt detection (via @augoust)
• IMPROVED: Lots of program restructuring (via @augoust)
• IMPROVED: OpenCV 3 support (via @emu4hire)

Improved slouch detection

• CHANGE: Improved slouch detection. Did not need c^2, just c suffices, and is actually better.
• Fixed up README a bit
• Restructured slouchy.ini layout
• CHANGE: Renamed calculate_c_squared function to more generalized calculate_current_posture
• MERGED: Optional warmup delay (for Mac cameras, and possibly others) now included in this stable release.

Still looking for testers, particularly those who have 720/1080p webcams.

Experimental release

• CHANGE: Slouching calculation now uses only y for calculation
• FIX: Slouch detection should now be improved on high resolution webcam.
• ADDED: Optional warmup delay for cameras which need to power on for a bit before operating.

Need testers. Any help is appreciated.

Updated slouch detection

• Setup now in right-click menu for easier use
• Slouch detection now compensates for the width of the user's webcam

Initial release

Initial release