comment headers

Add description to every function of the following classes in their header file.

Please Note: header files are defined twice. once under modules/module name/headers and under build/include. Please make sure you make the changes under modules/module name/headers ONLY.

• RoundOpticalComponent
• RoundMirror
• RoundLEns
• RoundFilter
• RoundDetector
• Photon
• OpticalMachine
• OpticalComponent
• ObjectiveFunction
• AbstractOptimizer
• LineSearchOptimizer
• GradientDescenetOptimizer
• Trackable
• ThreeD
• Formatter
• Plane