日常工具，js文件压缩合并
代码
使用
PS D:\dev.workspace\node\merge> node merge.js
uglify... <<< test/instrument.js 979/ 3321 = 0.2947907256850346
uglify... <<< test/instrument2.js 1486/ 4583 = 0.3242417630373118
uglify... <<< test/core.js 9850/ 27423 = 0.3591875433030668
writing file >>> __output__.js 12357 bytes
all done!
