[FEATURE] Add isString condition ViewHelper
[FEATURE] Add isUppercase condition ViewHelper
[FEATURE] Add isLowercase condition ViewHelper
[TASK] Add renderChildren() to enable inline usage
[FEATURE] Add preg ViewHelper
[BUGFIX] Incorrect class names
[FEATURE] Add isArray ViewHelper
[TASK] Add optional template variable assignment
[TASK] Remove wrong usage of renderChildren in condition ViewHelpers
[FEATURE] Add isNumeric ViewHelper
[FEATURE] Add isFloat ViewHelper
[FEATURE] Add isInstanceOf ViewHelper
[FEATURE] Add isInteger ViewHelper
[FEATURE] Add isObject ViewHelper
[DOC] Impoved wording
[FEATURE] Add isNull ViewHelper
[FEATURE] Add contains ViewHelper
[FEATURE] Add isTraversable ViewHelper
[FEATURE] Add isQueryResult ViewHelper
[FEATURE] Add isDomainObject ViewHelper