Work around apt-get issues (c/o @codygman)

See:
https://github.com/TechEmpower/FrameworkBenchmarks/pull/834#issuecomment-57629157
GHC 7.8
Clean up Yesod code with stylish-haskell
yesod 1.4 and disable non-raw MongoDB
Set the LANG environment variable
Some Yesod (attempted) optimizations
Merge pull request #834 from snoyberg/master

Yesod updates for GHC 7.8
Fix minor bugs with installer (mongodb should work properly now)
Merge branch 'master' of https://github.com/TechEmpower/FrameworkBenchmarks
Merge remote-tracking branch 'te/master' into php_5.4.33_upgrade