GHC 7.8 compatibility
remove unused qualified import
We don't need this import on modern versions of lens
version bump
0.2.5 CHANGELOG
Updated copyright
Avoid using ANN. This should eventually allow us to provide stage1
builds for distributions
Replace the explicit use of lens TH with a manual class.
patch level bump
patch CHANGELOG
`temporary` dep bump
ghc-prim only needed between GHC 7.4 and 7.6
add packunused and packdeps to the travis config
Num instances for Bit1 and Bit2
Export GVariable and its methods

Exporting this class and its methods enables authors
to use the generically derived exists and forall implementations
as utilities while generating their own instances.
Merge pull request #6 from glguy/expose-gvariable

Export GVariable and its methods
Expose better genericForall and genericExists operations
Unify Encoding and Decoding in Codec