v1.0.0 - Jörmungandr

Offspring of Loki and Angrboða and sibling of Hel and Fenrir, Jörmungandr is a serpent that Odin threw to the ocean that's all around Midgard --the world of humans. It grew so large that it encircled the whole world and could bite it's own tail.

Thor caught it during a fishing expedition with Hymir using the head of an Ox as bait, but seeing as the struggle was destroying his boat, Hymir cut the fishing line before Thor could strike the deathblow.

It is foretold that the World Serpent will rise out of the sea during Ragnarök and will again battle Thor. This time, however, Thor will slay the beast but not before being poisoned by its venom. He will walk only nine steps before falling dead.

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With version 1.0.0, ggperiodic is feature-complete. I quashed a nasty bug and added good data.table support. See below.

New Features

• setperiodic() and setunperiodic() modify objects
  by reference. periodic() and unperiodic() can modify data.tables by
  reference also by setting options(ggperiodic.data.table.copy = TRUE)

• New qwrap() function for quickly wraping to any range.

Bug Fixes

• Fixed a nasty bug in the implementation of wrap().