Replacing zlib with snappy in traces, adding trace header, docs.

third_party/zlib.lua

@@ -1,41 +0,0 @@
-group("third_party")
-project("zlib")
-  uuid("AF89D75F-F723-47B1-9E29-29CDFA58CCAA")
-  kind("StaticLib")
-  language("C")
-  links({
-  })
-  defines({
-    "_LIB",
-  })
-  includedirs({
-    "zlib",
-  })
-  files({
-    "zlib/adler32.c",
-    "zlib/compress.c",
-    "zlib/crc32.c",
-    "zlib/crc32.h",
-    "zlib/deflate.c",
-    "zlib/deflate.h",
-    "zlib/gzclose.c",
-    "zlib/gzguts.h",
-    "zlib/gzlib.c",
-    "zlib/gzread.c",
-    "zlib/gzwrite.c",
-    "zlib/infback.c",
-    "zlib/inffast.c",
-    "zlib/inffast.h",
-    "zlib/inffixed.h",
-    "zlib/inflate.c",
-    "zlib/inflate.h",
-    "zlib/inftrees.c",
-    "zlib/inftrees.h",
-    "zlib/trees.c",
-    "zlib/trees.h",
-    "zlib/uncompr.c",
-    "zlib/zconf.h",
-    "zlib/zlib.h",
-    "zlib/zutil.c",
-    "zlib/zutil.h",
-  })