You can ‘withdraw’ them directly to a bitcoin address;
In order to send them from there, Make a wallet on Omniwallet https://www.omniwallet.org/
and import the private key to the bitcoin address;
Note: You will need about 0.25 USD worth of BTC to send MaidSafeCoins for each transaction from omniwallet.
Use http://masterchest.info/ with the bitcoin address to confirm that those coins exist to the address, that the transaction completed.