Let the application set this renderer to be not greedy.
bring upstream into origin
Merge remote-tracking branch 'upstream/master'
routine merge
Merge remote-tracking branch 'upstream/master'
Label frequency logic: don't create a tiny segment at the end.
Merge pull request #11 from tomrink/master

Contour2D, label freq improvement
Replaced plotting symbols for turbulence to conform to AWC/ADDS instead of GEMPAK [1456]
Merge pull request #12 from tomw2/inq1456

Replaced plotting symbols for turbulence to conform to AWC/ADDS instead ...
Fix for non-unique ADDE descriptor comment strings.
Merge remote-tracking branch 'origin/master'