Typos

[timotheeMM]

I found 3 typos in the repository:

• ligth -> light

  opencv_contrib/modules/bioinspired/src/retinafasttonemapping.cpp

  Line 24 in a0516f5

  ** This class is based on image processing tools of the author and already used within the Retina class (this is the same code as method retina::applyFastToneMapping, but in an independent class, it is ligth from a memory requirement point of view). It implements an adaptation of the efficient tone mapping algorithm propose by David Alleyson, Sabine Susstruck and Laurence Meylan's work, please cite:

• highligths -> highlights
  

  opencv_contrib/modules/bioinspired/doc/retina.markdown

  Line 123 in a0516f5

  

• ligth -> light
  

  opencv_contrib/modules/bioinspired/include/opencv2/bioinspired/retinafasttonemapping.hpp

  Line 27 in a0516f5

  ** This class is based on image processing tools of the author and already used within the Retina class (this is the same code as method retina::applyFastToneMapping, but in an independent class, it is ligth from a memory requirement point of view). It implements an adaptation of the efficient tone mapping algorithm propose by David Alleyson, Sabine Susstruck and Laurence Meylan's work, please cite: