Fix sending next queued websocket notification.
Remove 'getaddressbalance' extension RPC.

Addresses do no have balances.  In situations where a payment is
required and just a single address was provided, it is better to track
the unspent outputs themselves, rather than watching some artificial
measure of payment.
Send btcdconnected ntfns to connected clients.

If a websocket client was already connected and the wallet and/or
chain server is loaded into the rpc server (enabling the handlers
specific to those components), the btcdconnected notifications were
not being sent, and this could break clients that expected the
notification.  I'm not happy with this change, but since this is how
notifications are currently done (unsolicited), and to not break
compatibility yet, I'm adding these back in for now.

Eventually, this notification will require explicit registration
before it is received by a client.  See issue #84.

Closes #115.
Fix typos from my last commit.
Fix build.
Use btcd-specific RPC user/pass for chain RPC.
Drain notification registeration channel.

This prevents a hang when attempting to set the wallet (and register
for wallet notifications) when the process is interrupted and the rpc
server begins shutting down.
IMPORT PATH MODIFICATION CHANGESET
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Please use this changeset as the first one on top of the conformal codebase.
Note that if there are new imports, they need to be changed as part of this
changeset. In general, use "git rebase" on github.com/conformal's version
and apply this changeset first.
Task #396 on Task Board:

Create a stub websocket call getdepositscript.