added test in configuration values for missing interface behaviour
renamed classes to Sql camel case
renamed classes to Sql in camel case
renamed classes to Sql in camel case (windows case insensitivity problem)
fixed ProgressBar.java deprecation issue
fixed deprecated junit import
removed commented code
renamed classes to Sql in camel case in gwt dependencies
Merge pull request #82 from HPI-Information-Systems/backend_csv

added tests, improved documentation and renamed classes