New readline module is required for CJK chars

For more detail, see
https://github.com/joyent/node/commit/94284e7d2e558cc3f1a985460fb0cc6606133766
Add ttv.js to download providers

youtube.js and yam.js removed:
1. yam depends on youtube
2. rg3/youtube-dl is an implementation containing signature generating,
   which is my final goal