faster reload; colorize symbols; environment variable; comments++; cleanup

faster reload; colorize symbols; environment variable; comments++; cleanup

Note that Python's XML parser is picky about accents. Choose encoding
ISO-8859-1 for latin1 accents or UTF-8 for UTF-8 accents. (Don't use latin1
comments in UTF-8 encoding!) Use xmllint to check for the validity of your
XML files (or let ./scripts/tools/fg-check do that for you):

  $ xmllint a26-yasim.xml
  a26-yasim.xml:113: parser error : Input is not proper UTF-8, indicate encoding !
  Bytes: 0xE8 0x73 0x20 0x6C
                   moment d'apr?s la doc : ________________________ = __________ =
                               ^