Trim judge names and phone numbers

This prevents one from having a judges name that is blank.
Make sure current judge is valid before selecting

If you choose a judge in one category and then select a different
category then the previous judge would try and be selected as the
current judge, thus creating an undefined judge.

Fixes #325.

task #325: Disallow empty judge name 
http://github.com/jpschewe/fll-sw/issues/issue/325
Display no shows in the subjective score summary

Fixes #324
Merge branch 'ticket.325-Disallow_empty_judge'
Merge branch 'ticket.324-Add_no_shows_to_score_summary'
Update changes

task #325

task #324: Add no shows to score summary 
http://github.com/jpschewe/fll-sw/issues/issue/324