Rename Configuration into ValidatorConfiguration
Rename ConfigurationLoader into ValidationConfigurationLoader
Add ConfigurationLoader to load DVResource object from central configuration file
Change command parameter to specify the central configuration file
Add a sample of central configuration file
Add handling of invalid configuraiton
Refactor the configuration load method and add the tests
Added error handings and tests to ValidatorConfigurationLoader
Make loadConfiguration static method
Fix the too much verbose log
Merge pull request #47 from takahi-i/add-central-config-file

Add central config file