Error handling

• catch/3
• throw/1
• instantiation_error/0
• uninstantiation_error/1
• type_error/2
• domain_error/2
• consistency_error/3
• existence_error/2
• permission_error/3
• representation_error/1
• evaluation_error/1
• resource_error/1
• syntax_error/1
• system_error/0