[gem] add state_machine
add migration for state in supports
add state machine logic
controller end point for acknowledging supports
make finish button a bit more universal
remove done column from supports

logic remains in state field
use state machine in finish_support service

still not sure it’s the best possible way
proper strategy for decent_exposure
cleanup decent exposure attributes in controllers
rollback and remove migrations
remove state machine
replace acknowledged with discussed
acknowledge support service
back to dealing with support on service-level
in the name of clarity!
simplify discussed method
Revert "proper strategy for decent_exposure"

This reverts commit c7fa7b402c1dd722b5513098e35348c6e755ade4.
bring finders back
add badges for circle and dependencies to Readme
Merge pull request #27 from netguru/readme_badges

add badges for circle and dependencies to Readme