add smsg service apis

[potmarion]

There are some services for Ghost RPC apis. Smsg service is ready to use. Everyone can send, view, list, delete messages.

[gmkaddar]

This isn't done, or at least I don't understand how it works haha.

Some issues I found:
Require /services doesn’t work everything is in /lib
No error handling when RPC port is unavailable. Uncaught error.
Error handling on incorrect user details non existent, uncaught error.
Running index, prints blockchain info as expected but there's no express or API handling or routing or anything to make this do anything.

All the code seems to be in the lib folder, which has all the functions ready to go but the index doesn't setup express.

[potmarion]

This is just a library, so every user can create their own express service and use these library functions. It's more efficient than making express functions here.