Allow newer versions of template-haskell #22
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We want to be able to compile with the newer versions of
template-haskell, without removing the ability to compile against older
versions if possible. Use the MIN_VERSION_template-haskell macro to
guard the changes. Add {-# LANGUAGE CPP #-} where necessary.
Exporting these previously internal helper functions allows the separation of the data constructor and the route instance. Yesod allows a similar separation. Without this, it can be tricky to avoid circular module dependencies. `mkRoute` and `mkRouteSub` are still exported as before.
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Also export
mkRouteData,mkRouteDispatchandmkRouteSubDispatchto allow separation of the data type from the routable instance.Bump the version while we're at it, as there are new features exposed.
I'm not so certain about the changes to the cabal file, feel free to make suggestions or edits.
Also, I suspect it would be better to bump the version in a separate commit. Just let me know.