Begin Rust track : hello-world, gigasecond

rust/hello-world/.exercism/config.json

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+{
+  "authors": [
+    "EduardoBautista"
+  ],
+  "contributors": [
+    "ashleygwilliams",
+    "ClashTheBunny",
+    "coriolinus",
+    "cwhakes",
+    "dvoytik",
+    "EduardoBautista",
+    "efx",
+    "ErikSchierboom",
+    "hydhknn",
+    "IanWhitney",
+    "ijanos",
+    "kytrinyx",
+    "lutostag",
+    "nfiles",
+    "petertseng",
+    "regnerjr",
+    "rofrol",
+    "stringparser",
+    "xakon",
+    "ZapAnton"
+  ],
+  "files": {
+    "solution": [
+      "src/lib.rs",
+      "Cargo.toml"
+    ],
+    "test": [
+      "tests/hello-world.rs"
+    ],
+    "example": [
+      ".meta/example.rs"
+    ]
+  },
+  "blurb": "The classical introductory exercise. Just say \"Hello, World!\".",
+  "source": "This is an exercise to introduce users to using Exercism",
+  "source_url": "http://en.wikipedia.org/wiki/%22Hello,_world!%22_program"
+}

rust/hello-world/.exercism/metadata.json

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+{"track":"rust","exercise":"hello-world","id":"497d2c7a5b364a44ae03dfa19b7eb555","url":"https://exercism.org/tracks/rust/exercises/hello-world","handle":"Xevion","is_requester":true,"auto_approve":false}