added class for virtual file
added virtual directory
added test for virtual file system. plus refactoring
added write method for type
tests for JSON
added JSON tests for enum and union. Also added eq operators for enum, union, filed and class method
added JSON tests and operator eq for ext. type, class, filed, class method. Also minor code improvements
added eq operators for relations. Also minor code improvements.
added json tests for templates and scope
minor refactoring
added json tests for relation, association, dependency and generalization
added json tests for multi-association and realization
minor code improvements
added method for generate project files.
added tests for project generator. Fix some cases, code improvements
Added test data
fixed tests for project maker
refactored translator API. p1
API2
minor code improvments