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
fixed error when docvalid command wihout any options
Merge pull request #48 from takahi-i/fix-docvalid

fixed error when docvalid command wihout any options
Change the main configuration format

- replaced two block names in the configuration file
-- "validator-config" into "validator"
-- "symbol-table" into "symbol"
Merge pull request #49 from takahi-i/change-config-format

Change the main configuration format
Make loadTable method in CharacterTable return boolean
Move support methods for creating CharacterTable into CharacterTableLoader class
Move remaining support methods for creating CharacterTable into CharacterTableLoader class
Add load method in CharacterTableLoader and replace the CharacterTable constructor into the load method
Enhance error handling of loading a character table file