changed suggests to be by default false in `rrt_init` and `rrt_refresh`, #86
and added parameter to both of those fxns to let user set suggests to be true or false
added suggests param to rrt_install2 fxn #86,
and suggests passed into rrt_install2 within rrt_init and rrt_refresh so user can pass on to download and install steps
repodeps fxn gains suggests param so that one can optionally install suggests or not