Complex Cells

• CplxKCell:

  • Use DCplxPort by default. These ports can have arbitrary angle and are micrometer based
    Any other port will be silently converted to DCplxPort

• library -> klib:
  Rename kf.library -> kf.klib, kf.KCell.library -> kf.KCell.klib, kf.kcell.library -> kf.KCell.klib in order to not confuse with the
  KLayout library and shadow it.

  Put deprecation warning and remove in 0.5.0

• autocell

  • move cache from cachetools.Cache[int,Any] to a dictionary {}
  • deprecate cache maxsize for 0.5.0: this is not necessary as a dictionary has infinite size and cache eviction is unwanted