added unit stub
added logger stub
added Unit, Logger to API
added unitname, unithelp
made Module, Task, Var units
added UnitName, UnitHelp stubs
impl UnitName
implemented UnitHelp
mv help to run, added stub unit_* to MTV, added stub unit test
impl UnitName test
impl UnitHelp test
min
added filter to Unit*
added partial to Unit*