Pretty logging for rebundle

Log the start and stop of rebundling the same way Gulp does, looks
pretty.

package.json

@@ -22,6 +22,7 @@
     "bower": "~1.3.5",
     "browserify": "~6.1.0",
     "browserify-shim": "~3.8.0",
+    "chalk": "~0.5.1",
     "coffeeify": "~0.7.0",
     "deamdify": "^0.1.1",
     "debowerify": "~0.9.1",
@@ -39,6 +40,7 @@
     "karma-chrome-launcher": "~0.1.4",
     "karma-coffee-preprocessor": "~0.2.1",
     "karma-jasmine": "~0.2.2",
+    "pretty-hrtime": "~0.2.2",
     "vinyl-source-stream": "~1.0.0",
     "watchify": "~2.0.0"
   },