http auth support

[acvetkov]

@vitalets

• append httpAuth support
• fix tests

#3

[vitalets]

maybe add .toString() method to locator object?
Then you will no need to import locatorToString and call it many times, just ..${locator}..

[acvetkov]

locatorObject is pure js object, that specified by client.
For example:

var locator = {
  buildType: {
    id: 123
  }
};

client.build.detail(locator)
  .then(processResponse);

I think, it's harmfull to force user import additional class from teamcity-client package.

var client = require('teamcity-client');
var Locator = require('teamcity-client/locator');

var locator = new Locator({
  buildType: {
    id: 123
  }
});
client.build.detail(locator)
  .then(processResponse);

[vitalets]

👍