Update README.md

The command for git-cloning the repo is using a Git URL with read/write access, which doesn't work for people without write access to the repo.
Merge pull request #65 from skddc/patch-1

Fix repo URL in README
Added UTXO to README. #68
update bitcore lib to 0.1.18
Update TransactionDb.js
add missing updates
Merge remote-tracking branch 'origin/update-bitcore' into update-bitcore
Merge pull request #71 from bitalo/update-bitcore

update bitcore = 0.1.18
Merge pull request #70 from cmgustavo/bug/01readme

Added UTXO to README. #68
add multiutxo api call
update README with new call
Merge pull request #73 from maraoz/feature/multiutxo

multiutxo multiple address utxo set API call
fix PeerSync
Merge pull request #74 from maraoz/fix/testnet-peer

fix PeerSync for testnet
update test.
fix bug handling unconfirmed txs
Merge pull request #75 from matiu/bug/fix-unconfigmed-tx

Bug/fix unconfigmed tx
update to bitcore 0.1.19
Merge pull request #76 from matiu/bug/fix-unconfirmed-tx2

update to bitcore 0.1.19
v0.1.10