• (kg) fixed bug where custom_levels beneath DEBUG didn't work
  
• (ms) fixed 5.00305 incompatibility reported by
  Brett Rann brettrann@mail.com (constants with leading _).
  
• (ms) Log::Log4perl->easy_init() now calls ->reset() first to make sure
  it's not duplicating the existing logging environment. Thanks
  to William McKee william@knowmad.com for bringing this up.
  
• (ms) fixed bug with error_die() - printed the wrong function/line/file.
  Reported by Brett Rann brettrann@mail.com.
  
• (ms) added %T to PatternLayout as a stack traced as suggested by
  Brett Rann brettrann@mail.com.