WWW::GoodData - created some methods

added methods:
* create_user - create new user
* assign_user - assign project role to user
* get_roles, get_roles_by_id - returns project roles
* schedule - create schedule
* schedule_msetl_graph - create msetl schedule
* create_clover_transformation - create clover transformation from given teplate
* schedule_msetl_graph - schedule msetl graph
* wait_project_enabled - wait until project is enabled

changes:
* create_project - added parameter template