README: whitespace fix
c: removed commented out debugging code
c: minor comment text tuning
test.lua: testing TYPE

It is special, since it creates new status const-objects
c: fixed unknown HIREDIS_REPLY_STATUS handling
README: some guidelines on how to work with hiredis.REPLY_STATUS values
c: minor indentation tuning
c: minor coding guidelines tuning
README,c,test: hiredis.status introduced, hiredis.{OK,QUEUED,PONG} deprecated

This solves (1) early binding problem when it was not possible to write e.g

assert(conn:command("RETURN", "FOO") == hiredis.FOO)

and (2) naming ambiguity problem, when Redis cound introduce a
new status that will clash with lua-hiredis naming (e.g. a status,
named `command`).

All hiredis.REPLY_STATUS objects are now created and cached automatically
by the MT "magic".

hiredis.{OK,QUEUED,PONG} are now deprecated in favor of their
hiredis.status.* counterparts.
lib/hiredis: updated to v0.10.1-34-gf2ddeea
COPYRIGHT,c: updated copyright years
c: updated LUAHIREDIS_VERSION
rockspec: replaced unreleased v0.1.3 with v0.2
HISTORY: replaced unreleased v0.1.3 with 0.2
README: attempted to fix Markdown formatting
lib/hiredis: updated to v0.11.0
c: checking available stack space where appropriate
c: minor style tuning
c: unwrap_reply now correctly handles nil, err arguments

It used to eat err. Oops.
test: SDIFF results are not ordered