add table_print to gemfile

Hi all - @gmacie let me know that table_print had been breaking your repo.  Turns out the one little thing that I didn't properly namespace was conflicting with some Devise code.  table_print v1.3.2 fixes the naming conflict and thus the unable-to-log-in problem.  Sorry for the trouble! Oh and if you don't want this PR that's fine, just thought I'd make the gesture of fixing what I had broken but if you want to use table_print in a different way or not at all, no problem :) -Chris