[#55724340] Setup 508 Bootstrap for Forms

@phirefly and @infamousamos started this task. I squashed their commits and added bootstrap3+datepicker in 42c60ad.  I then continued with adding bootstrap3 markup,  custom inputs, real world data for forms in seeds, and handled other minor style issues.  

I think we should add the 508 content before closing out this issue.  We may want to use the Chrome Accessibility tools (https://github.com/GoogleChrome/accessibility-developer-tools) to scan the current code, or we may want to close this issue and wrap the above task into a story that adds the Capybara-accessible gem (https://github.com/casecommons/capybara-accessible)?  Thoughts?

Regardless, can you check this for errors?  It should be responsive, all date pickers and custom selects should work.  The seed data will import form i-3 and sf-424.