ekmett/lens — pull request #30 by mgsloan (2012-09-03 00:31:37+00:00)
Title: Traversals support

Don't merge yet - I haven't tested it - because I get the following when I compile templates.hs:

ByteCodeLink.lookupCE
During interactive linking, GHCi couldn't find the following symbol:
lenszm2zi6_ControlziLensziTH_makeLenses_closure

This happens before my changes, as well (GHC7.6).