Support Mist IPC

[heikoheiko]

Mist uses named sockets to communicate with the nodes.
https://github.com/ethereum/mist
#24

[konradkonrad]

Here's a (potentially incomplete) list of rpc methods used by mist:

admin_addPeer
admin_exportChain
admin_importChain
admin_setSolc
admin_startRPC
admin_stopRPC
admin_verbosity
debug_dumpBlock
debug_getBlockRlp
debug_printBlock
debug_processBlock
debug_seedHash
debug_setHead
eth_estimateGas
eth_getBlockByNumber
eth_syncing
miner_makeDAG
miner_setExtra
miner_setGasPrice
miner_start
miner_startAutoDAG
miner_stop
miner_stopAutoDAG
net_addPeer
net_peerCount
personal_newAccount
personal_unlockAccount