[PD-111] Can change how many jobs appear in an email.
updated location of jobs per email field.
changed to positive small integer field.
properly showed x of y jobs.
Restricted input to increments of 10 less than 100 or 5.
Updated a couple of unit tests. I'm sure there are a few more.
Few more tests updated.
Fixed last few tests.
Changed selectors for email.
updated script reference
Merge pull request #984 from DirectEmployers/pd-111

[PD-111] Made number of jobs per email configurable.