libYAML binding for Lua

I am happy to announce release 5 of lyaml.

lyaml's home page is at http://github.com/gvvaughan/lyaml

This release cleans up all known bugs, and finishes the partial
implementation of lyaml.dump from the previous release.

Noteworthy changes in release 5 (2014-09-25) [beta]

Build:

• Significantly reduced pointer mismatch warnings from modern GNU
  compilers.

New Features:

• lyaml.dump now takes a second argument containing a table of
  potential anchor values in ANCHOR_NAME = { "match", "elements" }
  pairs format. The first time any are matched in the table being
  dumped, they are preceded by &ANCHOR_NAME in the output YAML
  document; subsequent matches are not written out in full, but
  shortened to the appropriate *ANCHOR_NAME alias.

Bugs Fixed:

• yaml.emitter no longer emits numbers in SINGLE_QUOTE style by
  default.
• yaml.emitter ().emit returns error strings correctly for invalid
  STREAM_START encoding, and MAPPING_START, SEQUENCE_START & SCALAR
  style fields.

Install it with LuaRocks, using:

luarocks --server=http://rocks.moonscript.org install lyaml 5

If the latest rocks are not yet available from the official repository,
you can install directly from the lyaml release branch, with:

$ luarocks install \
https://raw.githubusercontent.com/gvvaughan/lyaml/release-v5/lyaml-5-1.rockspec