ply-2.1.0

Added

• tracepoint provider to use the kernel's stable tracepoints.
• delete keyword to remove associations from a map.
• Numeric constants can now be in binary using the 0b prefix.
• Numeric constants can be grouped by insering _'s, i.e. one million
  could be written as 1_000_000 a 32-bit address could be written as
  0xc1ab_dead

Fixed

• Architecture specific files are now a part of the distribution
  tarball (#10).
• Multiple off-by-one issues with string literals have been fixed
  (#14).
• Unary operators now work with arguments that require AST rewrites
  (#11).