Add: config/config.yml

Added config/config.yml in order to remove MarkusConfigurator
Fix: MarkUsConfigurator
MarkusConfigurator now uses config/config.yml

MarkusConfigurator now don't set default settings.
Adding more config options to config.yml
Removed unused initializers

- Moved secret tokens configuration to config/config.yml
Modifying MarkUsConfigurator to handle generic call
MarkUsConfigurator: removing markus_config_repository_admin?

I used find . -type f -iname "*.rb" -exec sed -i \
"s/markus_config_repository_admin?/get_config_value('is_repository_admin')/g" {} \;
TO BE REMOVED: stubbing is not working with MarkUsCOnfigurator
Merge branch 'master' into MarkUsConfigurator2
Merge pull request #2 from benjaminvialle/MarkUsConfigurator2

Mark us configurator2