Adding snappy dependency (to replace zlib) for #505.

.appveyor.yml

@@ -69,7 +69,7 @@ build:
 
   # MSBuild verbosity level
   #verbosity: quiet|minimal|normal|detailed
-  verbosity: detailed
+  verbosity: minimal
 
 # scripts to run before build
 before_build:

.gitmodules

@@ -28,3 +28,6 @@
 [submodule "third_party/premake-core"]
 	path = third_party/premake-core
 	url = https://github.com/premake/premake-core.git
+[submodule "third_party/snappy"]
+	path = third_party/snappy
+	url = https://github.com/xenia-project/snappy.git

premake5.lua

@@ -163,6 +163,7 @@ solution("xenia")
   include("third_party/glew.lua")
   include("third_party/imgui.lua")
   include("third_party/libav.lua")
+  include("third_party/snappy.lua")
   include("third_party/spirv-tools.lua")
   include("third_party/xxhash.lua")
   include("third_party/zlib.lua")

third_party/snappy.lua

@@ -0,0 +1,22 @@
+group("third_party")
+project("snappy")
+  uuid("bb143d61-3fd4-44c2-8b7e-04cc538ba2c7")
+  kind("StaticLib")
+  language("C++")
+
+  defines({
+    "_LIB",
+  })
+  files({
+    "snappy/snappy-internal.h",
+    "snappy/snappy-sinksource.cc",
+    "snappy/snappy-sinksource.h",
+    "snappy/snappy-stubs-internal.cc",
+    "snappy/snappy-stubs-internal.h",
+    "snappy/snappy-stubs-public.h",
+    "snappy/snappy.cc",
+    "snappy/snappy.h",
+  })
+
+  filter("platforms:Windows")
+    warnings("Off")  -- Too many warnings.