haskell-greencard: add package
haskell-hayland: revert new addition

Reverts (one half of) NixOS/nixpkgs#4999, i.e. 55bb7dd1f2abf4df. The
package doesn't compile: http://hydra.cryp.to/build/249781/log/raw.
Please re-submit when the issue has been resolved.
Merge pull request #5048 from abbradar/greencard

haskell-greencard: add package
nasm: add a do-not-update comment
Adds libltc

Linear (or Longitudinal) Timecode (LTC) is an encoding of timecode data
as a Manchester-Biphase encoded audio signal. The audio signal is
commonly recorded on a VTR track or other storage media.

libltc provides functionality to encode and decode LTC from/to timecode,
including SMPTE date support.

libltc is the successor of libltcsmpte.

Homepage: http://x42.github.io/libltc/
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Merge pull request #5067 from jagajaga/vim_plugins

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