Update Wrapped instances for lens-4.0
Add Rewrapped instances for all Wrapped types
gitignore: cabal sandboxes
remove extraneous imports
travis: build with ghc-7.8.1-RC1, don't build with HEAD
travis: Allow build failure with 7.8.1-RC1

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Merge pull request #51 from diagrams/lens4

Update Wrapped instances for lens-4.0
D.Core.Types: Introduce a bit of knot-tying in nameSub

Fixes #43.
Introduce Typeable constraint on Prims (see #42)
Merge pull request #52 from diagrams/typeable

Introduce Typeable constraint on Prims (see #42)
implemented determinants
export determinant from Diagrams.Core
Merge pull request #53 from diagrams/det

Determinants of Transformations
added basis, generalized centerXY
Merge pull request #54 from diagrams/basis

Added `basis`, simplified `onBasis`
haddock: cannot link to modules in diagrams-lib

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haddock: mention Diagrams.Deform

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Initial measure work
merge master
working - no arrows