Issues upon transition to Standard_Boolean as bool

Derived class methods were redefined without the parent specification
redefinition.Also missing parentheses were added to cdl declarations.
Modified header file to follow class spec.
Fix warnings introduced by changing Intf and Intl from Standard_Boolean into Standard_Integer
Merge pull request #400 from tpaviot/review/wok-related-fixes

Issues upon transition to Standard_Boolean as bool