display optimisation
display only visible elements
Merge branch 'master' into peDisplayOptimisation

* master: (41 commits)
  better TimeCodeDlg with doc
  Dialog => TimeCodeDlg
  Delete MainView.h ans MainView.cpp
  removing blend and texture activation on loop and solid rect
  remove MainDialog and go to ++
  go to : ok
  better log when unknown command occurs
  comment invasive debug log in sony
  stop media when loading a file with vlc
  VLCTest open file in argument
  fix annoying log when closing sonycontroller serial port
  fix a bug when closing connection
  PhGraphic compatible with Qt 5.1
  fix SDL compilation with Qt 5.1
  TODO generate a warning
  upgrade doxyfile to doxygen 1.8.5
  remove unused PhgraphicStripController
  adding PhTimeCodeTest comments
  PhTimeCode doxygen : no warning
  better brief description for PhSony
  ...
remove unused MainDialog class
perform text size computation only if displayed