ARMORY-187 - Make armoryd calls match bitcoind calls

"Checkpoint" check-in. More changes to come. This one has:

-receivedfromsigner() -> getreceivedfromsigner()
-receivedfromaddress() -> getreceivedfromaddress()
-unlockwallet() -> walletpassphrase()
-relockwallet() -> walletlock()
-dumpprivkey() can return Satoshi-compatible Base58 keys.
-getreceivedbyaddress() can exclude transactions without a minimum
number of transactions.
-Minor documentation corrections.
Merge branch 'dev' of github.com:etotheipi/BitcoinArmory into dev