Added option to truncate at word ending in truncate filter

.gitignore

@@ -1,2 +1,3 @@
 .DS_Store
 node_modules/*
+.idea

lib/filters/truncate.js

@@ -10,22 +10,32 @@ var each = require('../utils').each;
  *
  * @param  {*}      input
  * @param  {number} len   Number of characters to truncate to.
+ * @param  {boolean} [entireEndingWord=true]   Text should end with an entire word
  * @param  {string} [end="..."]   Text that will be appended if the string was truncated
  * @return {*}
  */
-module.exports = function (input, len, end) {
-  end = (typeof end === 'undefined') ? '...' : end;
+module.exports = function (input, len, entireEndingWord, end) {
+    entireEndingWord = (typeof entireEndingWord === 'undefined') ? true : entireEndingWord;
+    end = (typeof end === 'undefined') ? '...' : end;
 
-  if (typeof input === 'object') {
-    each(input, function (value, key) {
-      input[key] = module.exports(value, len, end);
-    });
-    return input;
-  }
+    if (typeof input === 'object') {
+        each(input, function (value, key) {
+            input[key] = module.exports(value, len, entireEndingWord, end);
+        });
+        return input;
+    }
+
+    if (typeof input === 'string' && input.length > len) {
+        input = input.substring(0, len);
 
-  if (typeof input === 'string') {
-    return input.substring(0, len) + ((input.length > len) ? end : '');
-  }
+        if (entireEndingWord) {
+            var lastSpace = input.lastIndexOf(' ');
+            len = lastSpace !== -1 ? lastSpace : len;
+            input = input.substring(0, len);
+        }
 
-  return input;
+        return input + ((input.length >= len) ? end : '');
+    }
+
+    return input;
 };