Moved lzlib to the libs directory (cleaner)

libs/lzlib/rockspec/INSTALL

@@ -0,0 +1,23 @@
+Installation
+------------
+
+    luarocks build lzlib-git-1.rockspec
+
+
+Troubleshooting
+---------------
+
+* Error: Could not find expected file libz.a, or libz.so, or libz.so.*
+  for ZLIB -- you may have to install ZLIB in your system and/or pass
+  ZLIB_DIR or ZLIB_LIBDIR to the luarocks command. Example: luarocks
+  install lzlib ZLIB_DIR=/usr/local
+
+  lzlib has a dependency on zlib, and currently (on Linux) LuaRocks
+  checks .so file existence by searching for the file in two hardcoded
+  paths, /usr/lib and /usr/local/lib. (instead of reading
+  /etc/ld.so.conf)
+
+  Try to locate libz.so, libz.a or libz.dll and re-run the command
+  with ZLIB_LIBDIR=/path/to/libz.so. In my case on Ubuntu 12.04 :
+
+    luarocks build --local lzlib-git-1.rockspec ZLIB_LIBDIR=/lib/x86_64-linux-gnu/

libs/lzlib/rockspec/lzlib-git-1.rockspec

@@ -0,0 +1,37 @@
+package="lzlib"
+version="git-1"
+source = {
+   url = "git://github.com/LuaDist/lzlib.git",
+   branch = "master",
+}
+description = {
+   summary = "Lua bindings to the ZLib compression library",
+   detailed = [[
+      This package provides a library to access zlib library functions
+      and also to read/write gzip files using an interface similar
+      to the base io package.
+   ]],
+   homepage = "http://luaforge.net/projects/lzlib/",
+   license = "MIT/X11"
+}
+dependencies = {
+   "lua >= 5.1"
+}
+external_dependencies = {
+   ZLIB = {
+      header = "zlib.h",
+      library = "z",
+   }
+}
+build = {
+   type = "builtin",
+   modules = {
+      zlib = {
+         sources = "lzlib.c",
+         libdirs = "$(ZLIB_LIBDIR)",
+         incdirs = "$(ZLIB_INCDIR)",
+         libraries = "z",
+      },
+      gzip = "gzip.lua",
+   }
+}