Update usage of WD.js for Selenium 2.34.0 and later.

I bumped the version of WD.js from 0.0.32 to 0.1.0 in the list of dependencies.  This version of WD.js does not supply default configuration values like the previous version.

I switched from using the `host` property to `hostname`.  With the Node URL module, using `host` will cause `hostname` and `port` to be ignored and the `host` property would have to contain the port.  So setting `host` as a default in runner.js would not allow `hostname` and `port` to be used.