Ability to set a http proxy for the request. Ant task for building a JAR.

[jastakhova]

Hi!

For my project it is essential to use a proxy for all http requests reaching external locations. I added a possibility to set a proxy when creating a Verify or PhoneId objects.

The code using a proxy parameter would look like

String customer_id = "CUSTOMER_ID_GOES_HERE";
String secret_key = "SECRECT_KEY_GOES_HERE";
Verify verify = new Verify(customer_id, secret_key, ProxyHostPort.buildProxy("PROXY_HOST", 8888 /* as a proxy port */));
VerifyResponse ret = verify.call("13103409700");

This pull request also includes an updated build.xml with an ant jar task.

[hmorales]

Hello Julia,
Please merge the latest updates from origin, then we can take a look at the proxy changes.

Thanks,
H