convert png to ppm:  XnConvert.exe  --download from internet
    a) input (TAB)-->'Add folder'-->select the flag folder
    b) action (TAB)-->'add action'-->'presets':'custom', 'Mode':'Fit','width':32,'height':20,'Enlarge/Reduce':'always,resample:LancZos'
    c) output(TAB)--> 'folder' xxx--> filename:{filename},format:'ppm-for portable pixelmap'
    d) convert (Button) --> copy to '.\apollo\custom\Philips\Slice\html5\dash\AmbiFlag\images\flags-grid-data'
        

1) the flags names is listed in: (keyHandle.js (c:\tpv-master\html5\dash\ambiflag):var flags=[...])

2) /3rd/html5/dash/AmbiFlag/images/flags-grid-data/index-to-file-map.txt also need to be updated
    you may enable 'print_grid_file_list' in 'keyHandle.js (c:\tpv-master\html5\dash\ambiflag):		//print_grid_file_list();'
   then press 'KEY_8' to get the list string, then copy from console log and save to 'index-to-file-map.txt'

3) country flag translate file: .\apollo\custom\Philips\Slice\res\mlm.xlsx

4) the mamb.o will auto match the idx to the filename of ppm from 'index-to-file-map.txt' to get the real ppm, 
   and only save idx in mamb local EEPROM:AMBI_NVM_WAVE_FLAG_FLAG_IDX //0xDB4  AMBI_NVM_WAVE_FLAG_ON_OFF //0xDB3

