Counterwallet update on

Folks with who encountered some of these problems below may want to access the beta site (or wait until this code is deployed to the main site).

- pubkeys can be manually provided (a field appears if CW doesn't find it in the bip32 wallet or in the blockchain)
- signature issue for multisig transation has been fixed 
- new counterblockd with plugin system and reorganized code
- sweep works well (in case of timeouts, wait 1 min and retry, but it should work fine as-is)
- the last normal address can be removed from CW

For devs, this is what's in the box:
- counterpartyd (master)
- counterblockd (develop) 
- counterwallet (develop)