bundle update
Merge pull request #61 from epicodus/update_gems

bundle update
remove bank_accounts and credit_cards tables

These some how have stuck around in the schema after being renamed.
On production, we have all the old account information, and the
tables don't exisit. Deleting them is to make sure anyone who might
clone this repository doesn't get unneeded tables in their database.
Merge pull request #60 from epicodus/remove-tables-from-schema

remove bank_accounts and credit_cards tables
add vcr to spec
Merge pull request #62 from epicodus/offline_specs

add vcr to spec
update homepage
Merge pull request #63 from epicodus/homepage

update homepage
add current_cohort association to admins

This is to prepare for admins being able to change their context to
different cohorts when viewing the app. Immediately it will allow
admins to see attendance statistics for whatever cohort they want.
Eventually this could help with admins seeing the right assessments
and class list.
add link for admins to attendance statistics page
allow admins to switch their current cohort to see different information
adjust assessments index to show different information for admins