added mongoid with search for MONGOHQ_URL modified gemfile because it seems like soemthing with active record was crashing the app deployed in heroku
modifying gemfile for this to work, all db are mongo sandbox
remove unused initialiers
removed dynamoid initalizer
changed dynamoid by mongoid in the models
store sessions locally again and remove favicon from view layout application
removed database.yml and returned sessions to cookies
no memchache anymore, no database.yml anymore, config/application.rb lines added, mongo has to work locally
options in mongoid.yml for User.find?by to raise nil instead of error