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 never told that those jobs have to be removed. I just said we do not have Nightly builds for beta and releases. So please read the comments more carefully, and make some more thoughts before jumping on doing the changes. Also if something is unclear I still miss questions.