update health check into middleware

Move middleware being loaded in initializers folder into config.ru and
create a rack health middleware to handle simple ping pon responses.
Remove old health check module
add request inspector middleware
add request inspector and static middleware
add rack protection for form authenticity

- add middle for authenticity into config.ru
- remove old csrf checks that no longer are needed
- update form to use hidden value authenticity_token
Merge pull request #8 from mentoring-nyc/middleware-updates

update health check into middleware