FT_SOURCEMOVIE displays the source reconstruction on a cortical mesh
 and allows the user to scroll through time with a movie. 

 Use as
   ft_sourcemovie(cfg, source)
 where the input source data is obtained from FT_SOURCEANALYSIS, or a 
 a parcellated source structure (i.e. contains a brainordinate field) and 
 cfg is a configuration structure that should contain

  cfg.funparameter    = string, functional parameter that is color coded (default = 'avg.pow')
  cfg.maskparameter   = string, functional parameter that is used for opacity (default = [])

 To facilitate data-handling and distributed computing you can use
   cfg.inputfile   =  ...
 If you specify this option the input data will be read from a *.mat
 file on disk. This mat files should contain only a single variable named 'data',
 corresponding to the input structure.