Init commit

Leap, Difference of Squares, Grains, Collatz Conjecture, Queen Attack,
Darts, Hamming, and Space Age completed yesterday.

Binary and Linked List completed today.

circular-buffer/.exercism/config.json

@@ -0,0 +1,24 @@
+{
+  "blurb": "A data structure that uses a single, fixed-size buffer as if it were connected end-to-end.",
+  "authors": [
+    "wolf99"
+  ],
+  "contributors": [
+    "ryanplusplus"
+  ],
+  "files": {
+    "solution": [
+      "circular_buffer.c",
+      "circular_buffer.h"
+    ],
+    "test": [
+      "test_circular_buffer.c"
+    ],
+    "example": [
+      ".meta/example.c",
+      ".meta/example.h"
+    ]
+  },
+  "source": "Wikipedia",
+  "source_url": "http://en.wikipedia.org/wiki/Circular_buffer"
+}

circular-buffer/.exercism/metadata.json

@@ -0,0 +1 @@
+{"track":"c","exercise":"circular-buffer","id":"59c5b2f86b7045f5914e30ddbad89d71","url":"https://exercism.org/tracks/c/exercises/circular-buffer","handle":"snowyforest","is_requester":true,"auto_approve":false}