resolve alias as cbitcoinaddress

This allows any address used as an alias, so any calls (internal,
external via rpc) can be used with alias names as a dropin replacement
for a syscoin address... ie: sendtoalias is not needed, sendtoaddress
does what we need.
Merge branch 'sendtoalias' of https://github.com/syscoin/syscoin into exp
stably demoable - but about to get its guts ripped out.