Topic: v1.4.1 conversion

all done!

- dimension2d.h
    (done) - new method getArea()
   
- ISceneManager.h
    (done) - new getMesh (from FileIO)
    (done) - addSceneNode adds default null to parent
   
- ISceneNode.h
    (done) - setDebugDataVisible param change
    (done) - isDebugDataVisible param change

- S3DVertex.h
    (done) - < operator overloads

- matrix4.h
    (done) - lots of methods changed return value to matrix
        - makeIdentity
        - setTranslation
        - setInverseTranslation
        - setRotationRadians
        - setRotationDegrees
        - setInverseRotationRadians
        - setInverseRotationDegrees
        - setScale
        - buildProjectionMatrixPerspectiveFovRH
        - buildProjectionMatrixPerspectiveFovLH
        - buildProjectionMatrixPerspectiveRH
        - buildProjectionMatrixPerspectiveLH
        - buildProjectionMatrixOrthoLH
        - buildProjectionMatrixOrthoRH
        - buildCameraLookAtMatrixLH
        - buildCameraLookAtMatrixRH
        - buildShadowMatrix
        - buildNDCToDCMatrix
        - buildTextureTransform
        - setTextureRotationCenter
        - setTextureTranslate
        - setTextureScale
        - setTextureScaleCenter
        - setM
       
    (done) - new method setScale (from float)