Added configuration lib and simple test for accessing properties file.
Added dummy values to existing properties file.
Added test for loading from custom.

Added custom configuration file to .gitignore.
Minor, moved testGetxx together.
Minor, wrap call for String.
Refactored responsibilities for config constants.

One class for the logic of accessing the config, another one for storing
the default values.
Changed static access on ConfigHolder.
Changed static access on ConfigHolder, iter2.
Changed configholder to load a base config when a value is requested but
no configuration has been loaded yet.
Added test for getting values from config when no configurations has been
previously loaded.