Merge pull request #14 from Neozaru/master

'get_address' RPC method for 'simplewallet'
Enable wallet refresh before blockchain is saved or completely sync'd.
Merge pull request #20 from artifexd/wallet_refresh

Enable wallet refresh before blockchain is saved or completely sync'd.
Merge pull request #21 from Neozaru/master

Added 'payment_id' optional argument to 'transfer' wallet RPC method
Merge pull request #2 from monero-project/master

Merging daemon RPC availability changes