3.6

• rename CCOpt to CCOption and deprecate CCOpt
• add iterator functions to CCIO
• CCOrd: add poly, deprecate compare
• add CCIO.File.walk_iter
• CCParse: heavy refactoring, many new functions, and broken compatibility for most programs
  • backtracking by default (not more try_)
  • changed the location system
  • add slice and the ability to recurse on them, split input into slices, while preserving locations
  • expose Position module, add or_, both, lookahead, U.bool
  • example Sexpr parser, and a test
  • example and test of an IRC log parser