Secure TCP sockets with Electrum servers

[chill117]

Depends on this issue in a cordova plugin dependency.

Resources:

• https://github.com/jawi/ssl-socket-demo/blob/master/ssl.socket/src/nl/lxtreme/ssl/socket/client/SslClient.java
• https://docs.oracle.com/javase/10/security/sample-code-illustrating-secure-socket-connection-client-and-server.htm#JSSEC-GUID-3561ED02-174C-4E65-8BB1-5995E9B7282C

[chill117]

Removing Electrum Server communication from the app in favor of web service APIs (mempool, esplora, etc.).