Job URLs no longer encoded, and the output has been tweaked a bit.

Notifications through this plugin from my company's Jenkins server were being double URL encoded. Seeing as it makes more sense for Jenkins to be doing the encoding on the POST and now us here, I've removed the ```encodeURI``` bit of code to prevent double encodings, resulting in bad URLs.

The other change I made is that many URL parsers out there have a hard time not linking ```)``` when its placed next to a ```/```, and we'd end up with a bad job URL like ```http://my.jenkins:1680/job/ProjectName/13/)```. So I pulled the URL out of paren parentheses, and instead am now just outputting after a colon.

* Before: ```Project Name build #13 succeeded (http://my.jenkins:1680/job/ProjectName/13/)```
* After: ```Project Name build #13 succeeded: http://my.jenkins:1680/job/ProjectName/13/```