D.TwoD.Polygons: documentation fix
Enable compilation with GHC HEAD (v7.9)
Merge pull request #211 from ggreif/master

Enable compilation with GHC HEAD (v7.9)
Allow lens-4.4
Use default field naming rules for TH-generated lenses

Remove special handling for Proxy fields.
No lenses are made for field names which do not begin with an _.
Name the Proxy field to take advantage of this convention.
The proxy record accessor is not exported, so renaming is not a problem.
Removing this code allows compiling with lens-4.4 as well as earlier.
CHANGES for 1.2.0.2
Wall: remove extra import

Not needed after 166a56b
Merge pull request #206 from pnutus/master

Added `arrowFromLocatedTrail`