Separated the NodeJS install script.
Update RTL to v0.5.4 and added automatic Hidden Service setup if Tor Active
* add install script for BTC-RPC-Explorer
* sets up a Hidden Service automatically
* supports Electrs to look up addresses if installed
* added a small script to enable txindex (needed for BTC-RPC-Explorer)
Detailed changes:
* nodeJS: add separate install script
* RTL: add Tor support and update
* BTC-RPC-Explorer: add install script
* btc-rpc-explorer: add script to activate txindex
* RTL: restart service if already installed
* RTL: opt out of data collection, start if installed
* rtl,btc-rpc-exp: Tor to forward to port 80
* btc-rpc-exp: add to SERVICES menu
