fix lh_graph

refactoring for qt5 breaks

fix data linking to new syntax

fixed a bunch of LH_FLAG_NOSAVE warnings

Added tag 0.0.30 for changeset 85cf4fd28ac8

move plugins into bin/

degree symbol fix

reinstated drivestats on win32

moved old link style checks into LCDHost

setLink() warns when old link syntax is used, sets NOSAVE for links