The argument to notNegative should be called 'value' instead of
'reference'.
Argument name was missing in the thrown Exception.
Initial implementation of the class ConditionalCheck. JavaDoc is still
missing, as well as tests.
Test to assure that all checks are implemented in Check and
ConditionalCheck
Added examples and documentation
Added unit test
Added missing tests case to get full code coverage
Checked wheter JavaDoc corresponds to return statements, because all
methods which do conversion cannot have a return value in
ConditionalChecks.
Merge branch 'master' of https://github.com/before/quality-check.git