yesod-static: improve messages for embedded compression tools

When trying various compression tools, display some messages
to the user about which compression tool is used.

--HG--
extra : rebase_source : e90e6ed49317b91a0fbe90d94f437459926f59e7
cereal 0.4 fpco/stackage#121
Update Socks dependency to fix build error
Merge pull request #608 from AaronFriel/master

Update Socks dependency to fix build error
optparse-applicative 0.6 #610
Export a TH-used identifier #609
Version bump
Version bump
Merge pull request #611 from wuzzeb/compress-messages

yesod-static: improve messages for embedded compression tools
Add an extensions line for TH
GHC 7.8 changes
Replace ghcError with throwGhcException #612
cabal-dev -> cabal sandbox
done message should reference the sandbox
add --force-reinstalls to .travis.yml
Newer entropy fixes #617
Merge branch 'master' of github.com:yesodweb/yesod
fix environment capitalize function
Version bumps
Replace lift . notFound to avoid a segfault bug