Template upload: revamp template name, use version file

If version file exists, it will be used. Now it'll look like this:

cfme-5.2.4.2-0624
cfme-nightly-5.3.0.0-15.el6cf.alpha7-0623
miq-nightly-201406242000
Actually, on line 68 I'm expecting "CloudForms" in the image name. But this is also a good point, I'm going to ensure that iŧ's lowercase and then check for text in it.