Added the getConfig and initConfig methods

lib/index.js

@@ -35,6 +35,7 @@ const DATE_FORMAT = "MMM D, YYYY"
  */
 function GitStats(dataPath) {
     this.path = Abs(Deffy(dataPath, DEFAULT_STORE));
+    this.config = {};
 }
 
 // Defaults
@@ -66,6 +67,50 @@ GitStats.DEFAULT_CONFIG = {
   , global_activity: false
 };
 
+GitStats.prototype.getConfig = function (callback) {
+    if (callback) {
+        ReadJson(CONFIG_PATH, function (err, data) {
+            callback(err && err.code !== "ENOENT" ? err : null, data || {});
+        });
+    } else {
+        try {
+            return ReadJson(CONFIG_PATH);
+        } catch (err) {
+            if (err.code !== "ENOENT") {
+                throw err;
+            }
+            return {};
+        }
+    }
+};
+
+GitStats.prototype.initConfig = function (input, callback) {
+
+    var self = this;
+    if (Typpy(input, Function)) {
+        callback = input;
+        input = null;
+    }
+
+    input = input || CONFIG_PATH;
+
+    // Handle object input
+    if (Typpy(input, Object)) {
+        this.config = Ul.deepMerge(this.config, GitStats.DEFAULT_CONFIG);
+        callback && callback(null, this.config);
+        return this.config;
+    }
+
+    if (callback) {
+        this.getConfig(function (err, data) {
+            if (err) { return callback(err); }
+            self.initConfig(data, callback);
+        });
+    } else {
+        this.initConfig(this.getConfig());
+    }
+};
+
 /**
  * record
  * Records a new commit.