Removed hyphens from phone number anchor tag

The phone number tag in the footer used to have hyphens, but I don't believe that is how the 'spec' works
Changed front page slider cover back to bus picture
Merge branch 'master' of github.com:acm-uiuc/liquid
Merge pull request #116 from colegleason/master

Change cover picture back to bus photo.
Merge pull request #118 from bjryan2/master

Adds ability to send a job email from intranet.