Export getOther to fix a build break in snap-1.0

Fixes the following build break:

Preprocessing library snap-1.0.0.0...
[16 of 33] Compiling Snap.Snaplet.Internal.Initializer ( src/Snap/Snaplet/Internal/Initializer.hs, dist/dist-sandbox-e9cec135/build/Snap/Snaplet/Internal/Initializer.o )

src/Snap/Snaplet/Internal/Initializer.hs:62:48:
    Module `Snap.Http.Server' does not export `getOther'
Failed to install snap-1.0.0.0
cabal: Error: some packages failed to install: