Add new jobs for jenkins

This is for issue #24, I added just jobs for desktop, for mobile if we decide we want to run them to we can just copy the job and add an extra parameter in xshell command. 
Regarding trigger.py, I added just a  plain script with options so it won't throw when called, this will be overwrited by upcoming pr from issue #17.
I mentioned more than once that we want to keep as much as possible from the mozmill-ci project. Something we totally need is log rotation. Do you want to manually update the master from old work spaces? This is an essential feature, which is missing.