Update dub.json

Rename package.json to dub.json and update the package name, so it can
be registered on code.dlang.org.

dub.json

@@ -0,0 +1,18 @@
+{
+    "name": "dyaml-dlang-tour",
+    "description": "YAML parser and emitter",
+    "authors": [ "Ferdinand Majerech" ],
+    "libs": [],
+    "importPaths": ["source"],
+    "license": "Boost 1.0",
+    "dependencies": { "tinyendian" : { "version" : "~>0.1.0" } },
+    "homepage": "https://github.com/kiith-sa/D-YAML",
+    "copyright": "Copyright © 2011-2014, Ferdinand Majerech",
+
+    "buildTypes":
+    {
+        "debug": { "buildOptions": ["debugMode", "debugInfoC"] },
+        "release": { "buildOptions": ["releaseMode", "optimize", "inline", "noBoundsCheck"] },
+        "profile": { "buildOptions": ["releaseMode", "optimize", "noBoundsCheck", "debugInfoC"] },
+    },
+}