removing unused partials

git show f0463ee4
reveals that
app/views/welcome/_job.html.erb &
app/views/welcome/_jobs.html.erb

were copied from app/views/jobs

to fix a bug. However, when the real source of the bug was fixed in
413ecfb5, the partials were never removed. That is remedied here.
Merge pull request #28 from koriroys/dead_code

Kori, I'm going to merge this and remove the welcome index action myself. Thanks (Y)