Log Message:
Update to 1.5.1

CHANGELOG:
# 1.5.1
* We no longer export Show (Q a) for GHC >= 7.4. This was causing random \ 
hangs when users tried to somehow run declaration splices from the REPL.
* We no longer depend on tagged for GHC >= 7.8, since `Proxy` is now in `base`.

# 1.5
* Added a flag to disable `template-haskell` support for GHC stage1 platforms.
* Added instances of `Reifies` for `GHC.TypeLits`