Write One Color Png File
Class full path: WriteOneColorPng.WriteOneColorPngFile
Create a one color png and write it to a file
Functions
__init__(height, width, color)            
          
      initialize
beginchunk(name, length)            
          
      begin chunk
endchunk()            
          
      end chunk
resetcrc()            
          
      reset the crc
write(file)            
          
      write to the file
write_byte_crc(c_value)            
          
      write a byte crc
writelong(l_value)            
          
      write a long value
writelongcrc(l_value)            
          
      write a long crc value
writewordcrc(s_value, reverse)            
          
      write word crc value