Sync temporary files before closing and renaming.
Add additional server shutdown checking.
Shutdown rpc client even if attempting reconnects.

Instead of checking whether the chain server client is currently
connected (as opposed to in a reconnect loop), always shutdown the
client connection so other rpc calls begin erroring.
Warn on Sync() failure instead of erroring.
Exclude immature coinbase outputs for listunspent.

Fixes #103.
IMPORT PATH MODIFICATION CHANGESET
----------------------------------

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.