bmech_emg_dynamic_normalization

 BMECH_EMG_DYNAMIC_NORMALIZATION(fld,ch before_str,after_str) will perform nonmalize filtereld EMG signals
  1-  est. local max events for all channel (*_rect_RMS)
  2-  est. global max based on local max events
  3-  normlize  *_rect_RMS

 ARGUMENTS
  fld          ... folder to operate on
  ch           ... name of emg channels to process (cell array of strings)
  before_str   ... string characters before subject_id
  after_str    ... string characters after subject_id
                   Example: File Name = 'Trimmed_HYA03_Walking_T02-level.zoo'
                   Subject ID = HYA03
                   before_str = ' Trimmed_'
                   after_str = '_Walking'
  static_str   ... str, name of static files (if any) to ignore
 *** note: if Subject ID is in the begining  of the file name
                         before_str='';