Update packager script.
Update packager script.

1. Reduce final package size by removing unnecessary files. Note that module `nodejieba` is also removed. This module is used by `pinyin` but only required when using word segmentation. Since it's larger than 10 MB, I decide to remove it.

2. Use asar to pack the source code into an archive.

3. Fix missing app name. Fix #196.

geeeeeeeeek/electronic-wechat,lileixuan/electronic-wechat,geeeeeeeeek/electronic-wechat,geeeeeeeeek/electronic-wechat,lileixuan/electronic-wechat,lileixuan/electronic-wechat