Peg gulp-livingstyleguide at 0.1.4

0.1.5 (re-)introduces a dependency on CoffeeScript:
81f9178f84

Signed-off-by: Alex Coles <alex@alexbcoles.com>

frontend/package.json

@@ -12,7 +12,7 @@
     "gulp-autoprefixer": "^2.1.0",
     "gulp-filter": "^2.0.2",
     "gulp-jshint": "^1.8.5",
-    "gulp-livingstyleguide": "~0.1.4",
+    "gulp-livingstyleguide": "0.1.4",
     "gulp-protractor": "0.0.11",
     "gulp-replace": "^0.5.3",
     "gulp-ruby-sass": "^0.7.1",